Riverbeds
(riverbed 的复数) n. 河床
🗣️ 情景例句
Yes, but I'm only an amateur.
是的，我仅仅是业余爱好。
Saying is one thing, and doing another.
说是一回事，做是另一回事。
easily obtainable from the lunar rocks in the form of liquid oxygen.
从月球上的岩石中很容易提炼出液态氧，