孜孜不倦

zī zī bù juàn de xué xí

孜孜不倦地学习

study with unfailing

tā zī zī bù juàn de xué fǎ yǔ

他孜孜不倦地学法语。

He applied himself diligently to learning french.

tā zī zī bù juàn de wèi ér zi de xué yè zhuàn qián

她孜孜不倦地为儿子的学业赚钱。

She worked assiduously to earn the money for her son’s education.