Leptin
n. 瘦蛋白
🗣️ 情景例句
I really feel bad about it,
我真过意不去。
I'll finish working at 5:30 and get home by 6 o'clock.
我希望在5:30完成工作并且在6点钟回家。
The eggs are sold by the dozen.
鸡蛋按打卖。