埋头苦干

máitóukǔgàn

HSK 7

埋头苦干 — máitóukǔgàn

1. to bury oneself in work; to be engrossed in work; to make an all-out effort

   为了赶完项目，他埋头苦干了好几天。 wèile gǎn wán xiàngmù tā máitóukǔgàn le hǎo jǐtiān — To finish the project, he buried himself in work for several days.