刻苦钻研

这位老工人几十年如一日在普通机床岗位上刻苦钻研精益求精，是全厂青年职工学习的道德典范。

zhè wèi lǎo gōng rén jǐ shí nián rú yí rì zài pǔ tōng jī chuáng gǎng wèi shàng kè kǔ zuān yán jīng yì qiú jīng, shì quán chǎng qīng nián zhí gōng xué xí de dào dé diǎn fàn.

This old worker has been working hard at an ordinary machine tool position for decades and strives for excellence. He is a moral model for young workers in the whole factory to learn from.

古今中外的许多伟大科学家，都是通过刻苦钻研才取得卓越成就的。

gǔ jīn zhōng wài de xǔ duō wěi dà kē xué jiā, dōu shì tōng guò kè kǔ zuān yán cái qǔ dé zhuó yuè chéng jiù de.

Many great scientists in ancient and modern times, both at home and abroad, achieved outstanding achievements through hard work.