蚊子再小也是肉

1. • lit. even a mosquito, though tiny, provides some nourishment (idiom)
2. • fig. it's better than nothing

Character by character

• 蚊(wén)mosquito
• 子(zi)noun suffix, as in 椅子 yǐzi "chair"
• 再(zài)again
• 小(xiǎo)small
• 也(yě)also
• 是(shì)be
• 肉(ròu)meat