🪄 1A 词汇表
explore
/ɪkˈsplɔːr/
v.
释义 Definition
To travel around a new place to learn about it.
探索，探险，勘察
课本原句
Maybe ‘Oumuamua was a spaceship that came to explore our solar system.
knock
/nɑːk/
v.
释义 Definition
To hit something hard or push it away.
碰撞，撞击，击打
课本原句
Perhaps it was knocked out of a far-off star system.
maybe
/ˈmeɪbi/
adv.
释义 Definition
Used to say that something is possible; perhaps.
也许，可能，大概
课本原句
Maybe ‘Oumuamua was a spaceship that came to explore our solar system.
pass
/pæs/
v.
释义 Definition
To move past someone or something.
经过，穿过，越过
课本原句
However, astronomers saw that its speed increased after passing the sun.
speed
/spiːd/
n.
释义 Definition
How fast someone or something moves.
速度，速率，疾行
课本原句
The object’s speed and direction also showed something surprising.
strange
/streɪndʒ/
adj.
释义 Definition
Hard to understand or explain; unusual.
奇怪的，奇特的，不可思议的
课本原句
A strange object was moving through the solar system.
technology
/tekˈnɑːlədʒi/
n.
释义 Definition
The use of science and machines to do things.
科技，技术，工艺
课本原句
“’Oumuamua could be a piece of alien technology,” says Professor Abraham Loeb from Harvard University.
thin
/θɪn/
adj.
释义 Definition
Not wide or thick.
细长的，薄的，瘦削的
课本原句
It was long and thin—like a cucumber.
📖 课文原文 · A Mysterious Visitor
Paragraph A
In October 2017, astronomers in Hawaii saw something surprising.
A strange object was moving through the solar system.
They had seen many asteroids before, but this was something different.
It was long and thin—like a cucumber.
The object’s speed and direction also showed something surprising.
This was an interstellar1 object—the first ever seen.
1 If an object is described as interstellar, it has traveled between different stars. (星际天体：在不同恒星系之间穿行的天体)
Paragraph B
The object was named ‘Oumuamua—Hawaiian for “visitor from afar.”
Nobody is sure exactly what it is.
The simplest idea is that ‘Oumuamua is a strangely shaped piece of rock.
Perhaps it was knocked out of a far-off star system.
However, astronomers saw that its speed increased after passing the sun.
Some scientists therefore suggest a different theory.
Paragraph C
“’Oumuamua could be a piece of alien technology,” says Professor Abraham Loeb from Harvard University.
Loeb believes this could explain the object’s long, thin shape, and also its change in speed.
Maybe ‘Oumuamua was a spaceship that came to explore our solar system.
“All possibilities should be considered,” says Loeb.
Paragraph D
‘Oumuamua can no longer be seen from Earth.
But astronomers continue to study the information they got from it.
It is still not clear if the object was a large rock, or something else altogether.
‘Oumuamua will likely be a mystery for many years to come.
- August 2017 & Origin: Entered the inner solar system. Possibly came from a star system 25 light-years from our sun—a 600,000-year journey.
- Top Speed: Reached a top speed of 315,800 km/h (more than 250 times the speed of sound) as it passed the sun.
- October 2017: First seen by astronomers in Hawaii when 33 million km from Earth (about 85 times further than our moon).
得分: 0
Before You Read · p.8
A. Look at the image and read the caption. Complete the definitions using the words in bold.
An artist’s drawing of ‘Oumuamua—a strangely shaped object that passed by Earth. Astronomers are not sure if it was an asteroid, or something else altogether.
An artist’s drawing of ‘Oumuamua—a strangely shaped object that passed by Earth. Astronomers are not sure if it was an asteroid, or something else altogether.
1. ______ : scientists who study objects in space
2. ______ : a rock that moves through space
1. B. Skim the passage. According to some scientists, what else could 'Oumuamua be?
Reading Comprehension · p.11
A. Choose the best answer for each question.
1. What is the reading mainly about?
2. What did scientists learn from studying ‘Oumuamua’s speed and direction?
3. What is NOT given as a reason why ‘Oumuamua could be an alien spaceship?
4. In paragraph C, what does considered mean?
5. According to the infographic on page 10, when was ‘Oumuamua first seen from Earth?
Textbook infographic · p.10
B. Complete the summary with the phrases in the box. One is extra.
a. alien technology · b. a cucumber · c. another star system · d. a rock · e. its speed and direction · f. our solar system
In October 2017, astronomers saw a strange object that was shaped like 1____. By studying 2____, the scientists realized that the object had come from 3____. The object was called ‘Oumuamua. Most scientists think it was just 4____. However, others—such as Abraham Loeb—have suggested it could be a piece of 5____.
a. alien technology · b. a cucumber · c. another star system · d. a rock · e. its speed and direction · f. our solar system
In October 2017, astronomers saw a strange object that was shaped like 1____. By studying 2____, the scientists realized that the object had come from 3____. The object was called ‘Oumuamua. Most scientists think it was just 4____. However, others—such as Abraham Loeb—have suggested it could be a piece of 5____.
1. In 2017, scientists saw an object shaped like 1____:
2. They studied 2____ and realized...
3. ...it had come from 3____:
4. Most scientists think it was just 4____:
5. ...suggested it could be a piece of 5____:
Reading Skill & Critical Thinking · p.12
Scanning
You scan a text when you want to find specific information. When you scan, you only look for the information you want. You don’t read the rest of the text. For example, for the question What does ‘Oumuamua mean in Hawaiian?, look through the text for the words ‘Oumuamua and Hawaiian, and possibly quotation marks (“ ”).
You scan a text when you want to find specific information. When you scan, you only look for the information you want. You don’t read the rest of the text. For example, for the question What does ‘Oumuamua mean in Hawaiian?, look through the text for the words ‘Oumuamua and Hawaiian, and possibly quotation marks (“ ”).
A. Look back at Reading A. Find and underline these words in the passage as quickly as you can: 1. Hawaii; 2. surprising; 3. theory; 4. alien; 5. solar system; 6. likely.
B. Read the questions below. Think about what answers you need to look for. Then scan Reading A and the infographic on page 10, and write the answers.
1. When did astronomers first see 'Oumuamua?
2. What does 'Oumuamua mean in Hawaiian?
3. When did 'Oumuamua's speed increase?
4. What is Abraham Loeb's job?
5. Where does Abraham Loeb work?
6. When did 'Oumuamua enter the inner solar system?
7. What was 'Oumuamua's top speed?
8. How far was 'Oumuamua from Earth when it was first seen?
Critical Thinking · Applying Ideas. What extra information about ‘Oumuamua would be useful to help scientists solve the mystery?
📘 1A 核心词汇
点击发音跟读，展开中文释义检查记忆。
跟读 0 次
中文释义
探索跟读 0 次
中文释义
敲；碰撞跟读 0 次
中文释义
也许跟读 0 次
中文释义
经过跟读 0 次
中文释义
速度跟读 0 次
中文释义
奇怪的跟读 0 次
中文释义
技术跟读 0 次
中文释义
细的；薄的得分: 0
Vocabulary Practice A · p.13
Read the information. Match each word in red with its definitions.
Crop Circles
A farmer wakes up to find something very strange. Someone, or maybe something, has made unusual shapes in his field by pushing down his crops. The shapes can only be seen from the sky. These are called crop circles.
Some people think that aliens make crop circles when they land their spaceships. However, it seems clear that they are made by people. The technology to make them is simple—just a rope and different sizes of wood to make thick or thin lines.
Some people make crop circles so others will believe in aliens. Other people make them just for fun.
Crops are plants grown in large amounts.
Crop Circles
A farmer wakes up to find something very strange. Someone, or maybe something, has made unusual shapes in his field by pushing down his crops. The shapes can only be seen from the sky. These are called crop circles.
Some people think that aliens make crop circles when they land their spaceships. However, it seems clear that they are made by people. The technology to make them is simple—just a rope and different sizes of wood to make thick or thin lines.
Some people make crop circles so others will believe in aliens. Other people make them just for fun.
Crops are plants grown in large amounts.
1. hard to understand or explain
2. perhaps; possibly
3. not wide or thick
4. the use of science and machines to do things
Vocabulary Practice B
Match the two parts of each definition.
1. If you move at high speed,
2. If you knock something,
3. If you pass a place,
4. When you explore a place,
Vocabulary Practice C · Word Usage
The past tense of the verb pass (passed) is sometimes confused with the preposition past. Complete the sentences by circling the correct words.
1. Scientists saw a large asteroid moving ______ Earth.
2. I ______ by the supermarket on my way home, so I bought some bread.
3. My friend just walked ______ me and didn’t stop to chat.
4. ‘Oumuamua reached its top speed as it ______ the sun.
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