Pregnene
[化] 孕烯; 孕甾烯\\n[医] 孕烯
🗣️ 情景例句
Before the barbeque let's sharpen all the knives.
烧烤之前先把刀磨一磨。
Which country do you come from?
你从哪一个国家来？
Gradually the river grows wider, the banks recede,
然后河面渐渐地变宽，两岸后撤，