Yemen
n. 也門
??? 情景例句
I know it well.
我對(duì)它熟得很。
It really comes in handy.
有了它真是方便。
Similarly, our own present primitive chemical rockets, though good enough to orbit men,
同樣，我們目前使用的原始化學(xué)火箭，雖然可以把人送入軌道，