Polycalcium
多种钙
🗣️ 情景例句
Thanks. I'll see you Monday at the office.
谢谢。咱们星期一办公室再见了。
Let's go to the station to get a train into town.
我们到火车站去乘车进城。
Some types of birds cannot fly.
有些种类的鸟不会飞。