1.diet n. 饮食；日常食物 v. 照医生规定饮食,节食
(be) on a diet 节食
A balanced diet is necessary for good health.
Fresh fruit and vegetables are a very important part of our diet.
The doctor put her on a diet.
I’m not too heavy, so I never have to diet.
2.fit adj. 健康的，强壮的；适当的，适合的
keep fit 保持健康
be fit to do sth 适合做某事
