他不禁笑了起来。
He could not help laughing.
can't help (doing sth); can't refrain from
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.
他不禁笑了起来。
He could not help laughing.
看到照片我不禁哭了。
Seeing the photo, I could not help crying.