Undersurfaces
(undersurface 的复数) n.下面, 底面\\na. 水面下的
🗣️ 情景例句
Hi!
嗨！
Almost everyone is aware of environmental problems in America.
在美国，几乎人人都注意到环境问题。
As is so often pointed out, knowledge is a two-edged weapon which can be used equally for good or evil.
正像人们常常指出的，知识是一把双刃刀，可以用于造福，也可以用来为害。