Precalciferol
[化] 前钙化醇
🗣️ 情景例句
I hear the exams will be very tough.
我听说考试挺难的。
Will you sign with our contract at this price?
你能以这个价钱在合约上签字吗？
the story of a galleon that sank at the start of her maiden voyage in 1628 must be one of the strangest tales of the sea.
在1628年，一艘大帆船在处女航开始时就沉没了，这个流传至今的故事无疑是航海史上最离奇的事件之一。