Methylchloroformate
氯甲酸甲酯
🗣️ 情景例句
Examinations are at hand.
考试在即。
None but the wearer knows where the shoe pinches.
只有那个穿鞋人，才知哪里鞋轧脚。
It's cheaper, isn't it?
这更便宜些，是吗？