Immunocontraception
免疫避孕
🗣️ 情景例句
Language is for the exchange of idea, for communication.
语言是用来交换思想，用来交流的。
I really must be going now.
现在我真的该告辞了。
3 'I said it was a good idea all along.'
三、 我一直说这是个好想法。"