Uniramia
单肢动物
🗣️ 情景例句
Maybe he can do the same thing for your grandfather.
也许他能为你爷爷做同样的事。
It is easier to descend than to ascend.
下降容易上升难。
That's international practice. We can't break it.
这是国际惯例，我们不能违背。