体重减轻

• lose weight
• to lose weight

例句

1. 你体重减轻了这么多，真了不起！
   It's miraculous how much weight you've lost!
2. 我丈夫体重减轻了许多，他不得不系一根皮带来把裤子提住。
   My husband has lost so much weight that he has to wear a belt to make his trousers stay up.