保持身材英文是Keep fit。
例句：
1、我一直注意保持身材。
I'm watching my figure.
2、她的新年决心是要保持身材健美。
She made a New Year's resolution to get fit.
3、他经常运动，以锻炼身体和保持身材。
His body is honed and kept in trim with constant exercise.
4、她要保持身材苗条，就不得不节食。
She has to diet to stay slim.
5、很多人希望保持身材苗条，但同时又担心自己的健康。
A lot of people wish to be slim, but at the same time they are worried about their health.
嗷哟嗷哟
