asteroid
An asteroid is a large rock that travels through space and orbits the sun. It is much smaller than a planet and is mostly made of rock and metal.
例句
3 / 5The scientists found a new asteroid in space.
The scientists found a new asteroid in space.
The space agency is tracking the trajectory of the asteroid.
The space agency is tracking the trajectory of the asteroid.
Look at that huge asteroid in my science book!
Look at that huge asteroid in my science book!
词族
记忆技巧
The prefix 'aster-' means star (like the flower 'aster'). An asteroid looks like a star in the sky but is a rock ('-oid' means 'like').
快速测验
A large ___ is moving in space near the sun.
正确!
正确答案是: asteroid
例句
The scientists found a new asteroid in space.
everydayThe scientists found a new asteroid in space.
The space agency is tracking the trajectory of the asteroid.
formalThe space agency is tracking the trajectory of the asteroid.
Look at that huge asteroid in my science book!
informalLook at that huge asteroid in my science book!
Most asteroids in our solar system are located in the belt between Mars and Jupiter.
academicMost asteroids in our solar system are located in the belt between Mars and Jupiter.
Our company is investing in technology for future asteroid mining.
businessOur company is investing in technology for future asteroid mining.
词族
常见搭配
常用短语
the asteroid belt
the group of rocks between Mars and Jupiter
killer asteroid
an asteroid that could destroy life on Earth
asteroid strike
when an asteroid hits a planet
容易混淆的词
A comet is made of ice and dust and has a tail, while an asteroid is made of rock and metal.
A meteor is a rock that enters Earth's atmosphere and burns up, but an asteroid is still in space.
使用说明
Use 'asteroid' when talking about rocks orbiting the sun in space. It is a technical term but used commonly in science fiction and news about space.
常见错误
Don't confuse an asteroid with a 'shooting star,' which is actually a meteor burning in the atmosphere.
记忆技巧
The prefix 'aster-' means star (like the flower 'aster'). An asteroid looks like a star in the sky but is a rock ('-oid' means 'like').
词源
From the Greek word 'asteroeides,' which means 'star-like' or 'star-shaped.'
语法模式
文化背景
Asteroids are popular in movies as dangerous objects that might hit Earth, creating a sense of wonder and fear about space.
快速测验
A large ___ is moving in space near the sun.
正确!
正确答案是: asteroid
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