I tend to forget things unless I mark them down.

我常常会忘事，除非我把它们记下来。

《柯林斯英汉双解大词典》

I mark the center.

我盯他们的中锋。

youdao

I put a mark in the margin to remind me to check the figure.

我在页边做了个记号来提醒我核对一下这个数字。

《牛津词典》

The teacher wrote about him to a friend: "I have a student who will make his mark in music,if anybody will.

VOA: special.2009.02.08

but I mark the whole paper up with a lot of red ink if there are mistakes,

但我在批论文的时候，也会把语法错误的地方用红笔标出来，

与哲学系教授 - SpeakingMax英语口语达人

Second thing I want to note is, the little hash mark or the pound sign, that's identifying a comment.

我想要说的第二件事是，这个小斜杠或者是井字号，这是用来标注注释的。

麻省理工公开课 - 计算机科学及编程导论课程节选

"I know Mark is a competitor, and I understand Mark wants to win the job, " Smith said.

WSJ: Geno Smith gives himself 'F' for 1st Jets practice

So I mark them thumbs up once in a while, but mostly thumbs down, and even report certain of them as abuse or fraud.

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"I view Mark as a friend, and I find today's news totally shocking, out of character and horrible, " said John Giesea, chief executive of the Security Traders Association, where Mark Madoff once served as a governor and president of the trade group's New York affiliate.

WSJ: Mark Madoff and the Fraud's Burden