他写了一本专著。
He wrote a monograph.
专著
monograph; specialized text
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.
专
著
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.
专
See it in sentences
这本专著很厚。
This monograph is thick.