Petrologen
油母岩质
🗣️ 情景例句
You know, man's best friend is his dog.
你知道的，类最好的朋友就是狗。
Please send us your price list of quartz clocks.
请寄给我们贵方的石英钟价目单。
Good afternoon, class! Who's on duty today?
同学们，下午好！今天谁值日？