做/刻 + 记号
记号 (jìhao) is a noun meaning "mark," "sign," or "symbol." It refers to a distinguishing mark made to identify or remember something, such as a mark scratched on a surface or a symbol used for reference.
我在地图上做了一个记号,这样就不会迷路。
Wǒ zài dìtú shàng zuò le yí ge jìhào, zhèyàng jiù bú huì mílù.
I made a mark on the map so I wouldn't get lost.
她在书上画了很多记号,方便复习。
Tā zài shū shàng huà le hěn duō jìhào, fāngbiàn fùxí.
She made many marks in the book to make reviewing easier.
墙上有个奇怪的记号,不知道是谁留下的。
Qiáng shàng yǒu ge qíguài de jìhào, bù zhīdào shì shéi liú xià de.
There's a strange mark on the wall; I don't know who left it.