他在书上做了标记。
He made marks in the book.
sign; mark; symbol
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.
他在书上做了标记。
He made marks in the book.
这个标记很清楚。
This mark is very clear.