for having heard it many times
It's a Chinese idiom. Its pronunciation is "ě RSH ú n é ngxi á ng", which means that if you hear too much, you can repeat it clearly and in detail. It's from the longgangqian table.
The origin of Idioms
Ouyang Xiu, Song Dynasty, wrote in his longgangqian table: "I know my ears well, so I can read them in detail."
Discrimination of words
It's easy to read and practice makes perfect; it's easy to taste and seldom heard
Idiom usage
I've heard too much
for having heard it many times
sadden one 's friends and gladden one's enemies - qīn tòng chóu kuài
A full man knows not a hungry man - bǎo hàn bù zhī è hàn jī
one is long and the other is short - yī cháng yī duǎn