埋头苦干

wǒ jiù xǐ huan nǐ men zhè gǔ mái tóu kǔ gàn de jìn r

我就喜欢你们这股埋头苦干的劲儿。

I like your down-to-earth and hardworking spirit.

zhěng gè xià wǔ mǎ dīng yī zhí zài shí yàn shì li mái tóu kǔ gàn

整个下午马丁一直在实验室里埋头苦干。

Martin has been working hard in the laboratory all afternoon.