Precalciferol
[化] 前钙化醇
🗣️ 情景例句
My friends say I'm a real party animal.
我的朋友说我是个聚会迷。
Are you clear in your own mind what you ought to do.
你自己是否清楚该做什么？
He did not marry again and I was brought up without a woman's care;
父亲没有再娶，因此，我在没有母亲的环境里长大成人。