Agustite
磷灰石
🗣️ 情景例句
Richard, did you go to the aerobics class, really? Richard
你真的上了有氧运动课吗？
I ought to stay at home.
我应该留在家中。
It's a very old castle. It is the oldest one in Britain.
这个城堡很古老，它是英国最老的了。