I wrote it down on a slip of paper.

我把它记在一张纸条上。

《牛津词典》

She reaches in, digs her hand deep into the ball, and pulls out a slip of paper.

她把手伸进去，手臂深深插入球中，抽出一张纸条。

youdao

Before you can open the box, you must sign a slip of paper.

你在开箱之前，必须在纸上签名。

youdao

She dug into her peacoat for a slip of paper, then held it out.

NPR: Excerpt: 'The Assassins Gallery'

In the old days, a slip of paper authorising absence was known as a chit.

BBC: Nadine Dorries' fate rests on slip of paper

The next morning at breakfast I passed you a slip of paper.

NEWYORKER: History of a Disturbance