words
地球
earth
航天旅行
space travel
我不知道他正在做什么
I don`t know what he is up to.
行星
planet
这就是******原因
That`s why*******
我还没有完成家庭作业
I haven`t finished my homework yet.
宇宙飞船
spaceship
为了
in order to
Have you heard the latest news?
宇航员
astronaut
将宇航员发送到火星
send astronaut to Mars
为了不迟到,我早起
In order not to be late,I get up early.
计划,项目,工程
project
search for information
还没有人去过火星,因为火星太远了。
No one has been to Mars yet,because Mars is very far away.