Pyroabietic acid
[化] 焦松香酸
🧩 词语组成解析
🗣️ 情景例句
Have a nice weekend.
周末快乐。
I asked him to leave immediately, but he wouldn't.
我请他马上离开，但是他不肯。
The doctor began to operate on the boy.
医生开始给那个男孩动手术。