Tricalcium
三钙
🗣️ 情景例句
It's bound to happen sooner or later.
这件事迟早要发生。
Fat hens lay few eggs.
肥鸡不下蛋。
The conditions of society are such that skills have to be paid for in the same way that goods are paid for at a shop.
社会上的情况就是如此，技术是必须付钱去买的，就像在商店里要花钱买商品一样。