Pentanal
戊醛
🗣️ 情景例句
We have done so much
我们已做了这么多的事
Step by step the ladder is ascended.
登梯需要逐级登。
Above all, he refused to make any personal gain from his political work.
尤其是，他拒绝从所从事的政治事业中谋取个人利益。