Retinaldehyde
视黄醛
🗣️ 情景例句
He treated his employees with exceptional cruelty.
他对雇员非常残酷。
Goodbye. Thanks again for everything.
再见了，再次感谢你所做的一切。
You have to be able to check instructions.
你必须会查对说明。你必须会筹划工作。