Leptin
n. 瘦蛋白
🗣️ 情景例句
As a matter of fact,
事实上，
I'll let you know if anything comes up.
如果发生了什么事，我会让你知道。
Not at all, smiled Lucy. You're welcome!
“没关系，”露茜笑着说，“不用谢！”