Ethacetic acid
[化] 丁酸; 正丁酸
🧩 词语组成解析
🗣️ 情景例句
This is as useful as screen door on a submarine.
这毫无用处。
Would you mind if I opened the window?
我开窗，可以吗？
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。