So pull out a calendar and a red pen.

所以，把日历和红笔拿出来开始做记录吧。

youdao

I have a red pen.

我有一支红色的钢笔。

youdao

He took a red pen, circled the letters and then wrote.

他拿出一支红笔，圈住这些字符，并写到：哇！

youdao

In Option 2, Camp goes a little nutty with his red pen, completely removing the current Subchapters K and S from the Code.

FORBES: Business Return Due Dates

And so despite my status as a running refusenik, I found myself herded, among a crowd of far fitter, healthier, sportier types, into a pen behind the start line, part of a sea of red t-shirted runners beneath a threatening gray sky.

CNN: Crossing the Olympic finish line

While earning a master's in computer science at the University of Portland she taught undergrad Saudi men, who at first had a hard time taking her seriously, but eventually succumbed to her intellect and the fear of her red pen.

FORBES: Magazine Article