不无小补

not without some benefit

空言无补。

Empty words are of no use.

无补于事

be of no avail

补衣服

mend clothes

补袜子

darn socks

补车胎

repair a tyre

补墙洞

repair a hole in the wall

修桥补路

build bridges

地板上有的地方补了新的木板。

The floorboards have been replaced in some places.

一双补了又补的靴子

pair of boots which have been mended many times

补写

write up

补送上月份杂志

resend last month's magazines

补行登记

register

补新兵

recruit new soldiers

补征新兵

recruit new soldiers

补一些注解

add a few footnotes

补知识之不足

supplement inadequate knowledge

请补一个书面文件来。

Please add a hard copy.

缺什么, 补什么。

Add what is lacking.

补肺

tonify the lung

补肾

tonify the kidney