Tetrasaccharide
四糖
🗣️ 情景例句
I won't insist, but I think it's in your own best interests to quit smoking.
我不会坚持，但我想戒烟对你自己有好处的。
Come in,please.
请进！
There were twenty cars in the race.
参加比赛的有20辆汽车。