Precholecalciferol
[化] 前胆钙化醇
🗣️ 情景例句
I didn't have that when Richard and Susan were born.
在Richard和Susan出生时我可没有人帮忙。
False friends are worse than open enemies.
明枪易躲，暗箭难防。
Here's my signature.
我签好了。