目的是减肥的英文怎么说

减肥的英文表达是 "lose weight"。这个表达来源于英语动词 "lose" 的意思是 "丢失，损失"，加上名词 "weight"，意思就是减少体重。

下面是一些例句：

I'm trying to lose weight. 我在尝试减肥。
She's been following a low-calorie diet to lose weight. 她一直在遵循低卡路里饮食来减肥。
He's been going to the gym regularly to lose weight. 他一直定期去健身房减肥。

希望这些例句对你有帮助。