瘦弱的英文：
thin and weak

参考例句：

A cadaverous mongrel picking through the garbage.
从垃圾堆里捡来的瘦弱的混血儿。

Gastrointestinal parasitism is characterized gastroenteritis, unthriftiness and anemia
胃肠道寄生虫病的特征是:胃肠炎，瘦弱和贫血。

Thin and bony;angular.
瘦弱的瘦的，瘦骨嶙峋的；骨瘦如柴的

Limbs wasted by hunger
饿得四肢瘦弱.

He was emaciated by long illness.
他由于长期生病而瘦弱。

A shiver passed through the slight frame of the blind girl.
盲女瘦弱的身躯微微地一抖。

Appearing worn and exhausted;gaunt.
憔悴的显得疲惫的和筋疲力尽的;瘦弱的

His weak chest is a legacy of a childhood illness
他那瘦弱的胸脯是儿时患病的后遗症

You'd better tend to that thin girl.
你最好照看一下那个瘦弱的女孩。

He was so lean and brittle that his pistols and handcuffs seemed outsize
他是那么瘦弱，连手枪和手铐都显得太大。

thin是什么意思：
adj. 薄的；细的；瘦的，瘦削的；稀少的；淡薄的
adv. 薄；细；稀；疏；淡；微
v. 使薄；使细；使瘦；使稀薄；使淡；使稀疏
n. 细小（或稀薄）的东西；细小（或稀薄）部分

Skate on thin ice.
如履薄冰。

The thin end of the wedge is dangerous.
楔的细端是危险的。

a thin dribble of oil.
细线般滴下的油。

Thin and bony;angular.
瘦弱的瘦的，瘦骨嶙峋的；骨瘦如柴的

She has long thin shanks.
她有着细长的腿。

weak是什么意思：
adj. 疲软的；虚弱的；软弱的；愚钝的；不牢固的；淡薄的

a weak radio signal; a weak link.
微弱的无线电信号；薄弱的连接。

He has weak eyes.
她的视力不佳。

The spirit is willing But the flesh is weak
力不从心。

Alternate weakness with severity
恩威并济

There is an inherent weakness in the design.
这设计本身存在弱点。