Boletic acid
[机] 反-丁烯二酸
🧩 词语组成解析
🗣️ 情景例句
Don't worry.
别担心。
It seems he knows everything.
看起来他好像知道一切事情。
Mr. Smith knew Jack didn't look at the others because he was nervous.
史密斯先生知道杰克不敢看别人是因为紧张。