🗣️ 情景例句
Don't be too sure.
别那么肯定。
I think that should do it.
我想这样就可以了。
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
这个频率是空间氢原子释放的自然频率，是在1951年被人类发现的。