她在沙地上画了一条线。

She traced a line in the sand.

《牛津词典》

他在那页的中间画了一条线。

He draws a line across the center of that page.

youdao

她用粉笔在墙上画了一条线。

She drew a line on the wall with chalk.

youdao

Well one reason I want to go back is you'll notice I've been putting up these lines on the board and when we visited elections on the second day, we said that you could think of that line on the board, as being not just left wing, right wing politics but also some dimension of products.

原因之一是我想你们将注意到,我在黑板上画了一条线,当我学习第二天学习的选举时,我们讲过你们可以想象黑板上有条线,不仅是左派和右派的政治家,还可以是某种产品特性

耶鲁公开课 - 博弈论课程节选