Whewellite
水草酸钙石
🗣️ 情景例句
Hey, everybody,
嗨， 大家听着，
I ask him to see the doctor.
我要求他去看医生。
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。