go on a diet 与 lose weight有什么不同,用法有异吗

go on a diet节食是一种动作
lose weight而减掉肥是一种效果

go on a diet=== choose what you eat to prevent yourself being fat
节食以防止变胖
lose weight=== do something ,including taking exercise, to make yourself less fat than before
采取措施来减肥或者瘦身。

完全两个不同的固定短语，前者是“节食”后者是“减肥”

节食不等于减肥。

go on a diet：按规定饮食进食;开始节食【强调节食这一行动的开始】.lose weight：减肥；体重减轻（=take off weight)【侧重节食、减肥的效果】例如：After going on a diet for a year,she lost her weight obvious...