Tricalcium
三钙
🗣️ 情景例句
Oh, Somebody's at the door. I have to go.
哦，有人来了，我得去开门。
John is really scared of airplanes.
约翰真的很怕乘坐飞机。
We have agreed on all terms in the contract. Shall we sign it next week?
我们对合同各项条款全无异议，下周签合同如何？