Preconceptional
[医] 受孕前的
🗣️ 情景例句
I manage my time perfectly so that I can always get things done on time.
我很会利用时间，因此总能准时完成工作。
We can't recall how often he's written.
我们记不起来他每隔多久写一封信。
Yes?What's the letter.
怎么了？怎么回事？