脆弱的英文：
weak
frail

参考例句：

Financial fragility
金融脆弱

Lacking firmness or strength;flimsy.
脆弱的缺乏坚强或力量的;脆弱的

It is vulnerable and endearing.
它是脆弱又可爱的。

The frailty of old age;senility.
老迈，衰老老年岁人的脆弱;老态龙钟

Early aircraft were insubstantial constructions of wood and glue.
早期的飞行器是木头和胶粘合的脆弱机器。

Resembling a twig or twigs,as in slenderness or fragility.
细枝样的像细枝一样的，如在纤细脆弱上

Weak or thin;flimsy.
弱小的或瘦的;脆弱的

Not firm or solid;flimsy.
不坚固或不实在;脆弱的

The leaves are fragile and will fall one day.
叶子是脆弱的，终有一天会悄悄落下。

What a tender thing you are for a bullfighter.
你这个人太脆弱，当不了斗牛士。

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。

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。