Precholecalciferol
[化] 前胆钙化醇
🗣️ 情景例句
You are a terrific instructor, Jack.
你真是个了不起的教练 Jack。
Don't forget to phone to let us know you arrived safely.
不要忘记打电话，告诉我们你已经安全抵达。
We're having trouble arranging for a carrier.
因为货运公司的安排有问题。