Monohalogenation
一卤化作用
🗣️ 情景例句
First, we need to more public relations activities to promote understanding.
首先，我们应该更多地做公关活动以促进了解。
Please make an appointment with my secretary.
请跟我秘书定个见面时间。
Though these large machines still exist, many of their functions have been taken over by small powerful personal computers, commonly known as PCs.
虽然这种大计算机仍然存在，但它们的许多功能已被体积小但功能齐全的个人电脑——即我们常说的PC机——所代替了。