身体虚弱的英文：
frail

参考例句：

His illness has left him weak.
他的病使他身体虚弱。

Weakness compelled him to retire early.
他因身体虚弱而较早退休。

He is so weak that he can barely stand up.
他身体虚弱几乎站不起来

I was too weak from the flu to work.
我因患流行性感冒身体虚弱不能工作。

Mother objected that Jimmy was too weak to take up the job.
"母亲反对说,吉米身体虚弱,不可承担那份工作。"

frail是什么意思：
adj. 脆弱的，虚弱的；易碎的
n. 少女；少妇；灯心草篓

The bridge is a frail wooden structure.
这座桥的木质结构，很不结实。

Books are especially frail at the corners.
书角是特别易损的部位。

She lay in bed looking particularly frail.
她躺在床上，看上去特别虚弱。

The frail craft rocked as he clambered in.
他爬进来的时候，那件易碎的工艺品摇晃起来。

Snoopy was too frail to be shipped in the unheated baggage compartment of a plane.
斯努皮体质太弱，不适宜装在没有暖气的行李舱里空运。