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》

If a test passes, it is denoted with a green check mark.

如果测试通过，它将用一个绿色的复选标记来表示。

youdao

The American heart Association adorns certain products with a "heart check" mark.

美国心脏协会用一个“心部裂纹”的标记装饰某种产品。

youdao

And I think if we could put the check mark there, he'll get to White House, and that's the next check mark that we're going to have.

NPR: Where Now for GOP Hopefuls?

Mr. ALEX ROPSON: We made a sign that says New Hampshire, and he got a check mark there.

NPR: Where Now for GOP Hopefuls?

The goal is to end up with a check mark next to each message point FOR EVERY SINGLE ANSWER YOU GIVE TO THE REPORTER.

FORBES: Answering Media Questions With Precision -Media Training