Acetaldol
(=aldol)丁間醇醛, 3-羥基丁醛
??? 情景例句
When can we go fishing?
我們什么時候去釣魚？
Believe not all that you see nor half what you hear.
眼見的不能全信，耳聞的也不能半信。
'Hello, little girl,' she said.
“你好，小姑娘，”她說。