爱吃不胖英语怎么说

"爱吃不胖"用英文表达为"have a high metabolism", "metabolism is high". "Metabolism"在英文中指的是新陈代谢，也就是身体对食物的消化和利用的过程。有高新陈代谢意味着身体能够快速消耗能量，从而不易发胖。

举个例子：

She can eat whatever she wants and never gain weight because she has a high metabolism.
(她可以吃任何她想吃的东西，而不会增加体重，因为她有高新陈代谢。)
He's always been thin, must be because he has high metabolism.
(他一直很瘦，一定是因为他有高新陈代谢。)