他主动帮助同学。
He helps his classmates on his own initiative.
主动
to take the initiative; to do sth of one's own accord; spontaneous
Watch it being written
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
主
动
Nice writing!
Build with these blocks
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
主
See it in sentences
你要主动学习。
You should study proactively.