老弱的英文：
the old and weak

参考例句：

To manifest pity for the aged the weak
怜恤老弱

The quality or condition of being weakened, worn out, impaired, or broken down by old age, illness, or hard use.
老弱；残破由于年老、疾病或过度使用而使物质的品质或状况衰弱、陈旧、受损或倾塌

old是什么意思：
adj. 年老的；陈旧的；古老的；以前的；原来的
n. 古时

The Old Mandarin
老官吏

You old misery!
你这个爱抱怨的老家伙！

It is an old aphorism.
这是一句老格言。

Old friends and old wine are best
朋友是旧的好;古交友情深,陈酒香味醇

Old friends and old wines are best
陈酒味醇,老友情深

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。