If you look at the paper under a microscope you will see the fibres.

如果你在显微镜下观察这张纸，你就会看到纤维。

《柯林斯英汉双解大词典》

I found the toilet paper under a newspaper.

我在一份新闻报纸下找到厕纸。

youdao

Put a wad of paper under the leg of the table to make it level.

桌子腿底下垫点纸就平了。

《新英汉大辞典》

Under the cloth and stencil is a piece of paper.

VOA: special.2009.09.02

Then rinse under running water. In a public restroom, if you dry your hands with a paper towel, you should also use the towel to shut off the water and open the door.

VOA: special.2010.09.29

Under his expert hands, paper of almost any type, stiffness or thickness can be turned into a work of art.

VOA: standard.2010.03.17

When I emerged from the Sinn Fein office at Connolly House I found a rain-sodden piece of paper under my windscreen wiper.

BBC: Optimism among children of the Good Friday Agreement

Recent economic history yields no precedents for 10-year Treasuries under 2 percent and 30-year paper under 3 percent these past 60 years.

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It's a novel way for a hack to get a quote, but it sure beats coming back to your car and finding the piece of paper under your wiper is a parking ticket.

BBC: Optimism among children of the Good Friday Agreement