Retinaldehyde
视黄醛
🗣️ 情景例句
Jogging is a popular form of exercise.
慢跑是一种十分普及的体育活动。
An endly man rented the big white house.
一老人租用那大白房子。
This is the point I wish to emphasize.
这就是我要强调的论点。