他潜心研究。
He concentrates on research.
to concentrate fully on sth; single-minded
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.
他潜心研究。
He concentrates on research.
潜心学习。
Devote yourself to study.