他投入了很多时间。
He put in a lot of time.
to throw into; to put into; to throw oneself into
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
Nice writing!
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
他投入了很多时间。
He put in a lot of time.
资金投入了多少?
How much money was invested?