他学习落后了。
He fell behind in his studies.
to fall behind; to lag (in technology etc); backward
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.
他学习落后了。
He fell behind in his studies.
这里的技术很落后。
The technology here is backward.