You have understood my pains finally .
苦心 [kǔ xīn]
trouble taken; pains:
with great pains;
一片苦心
serious study and investigation;
苦心钻研
You have understood my pains finally .
苦心 [kǔ xīn]
trouble taken; pains:
with great pains;
一片苦心
serious study and investigation;
苦心钻研