Tetranitrin
四硝赤醇
🗣️ 情景例句
How come you speak such good English?
你为什么能说这么好的英语呢？
Experience is the father of wisdom and memory the mother.
经验是知识之父，记忆是知识之母。
The police were called in, but they could not arrest anyone,
警察被召来了，但他们却不能逮捕任何人，