他埋头苦干了一整天。
Tā máitóu-kǔgàn le yì zhěng tiān.
English
He buried himself in work all day long.
to bury oneself in work
to bury oneself in work (idiom); to be engrossed in work; to make an all-out effort; up to the neck in work
Every character draws itself stroke by stroke, then hands you the brush to trace it yourself.
Nice writing!
他埋头苦干了一整天。
Tā máitóu-kǔgàn le yì zhěng tiān.
He buried himself in work all day long.
你还在埋头苦干吗?
Nǐ hái zài máitóu-kǔgàn ma?
Are you still toiling away head down?
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.