如果你不能坐在地板上，就坐椅子上。

If you cannot sit on the floor, you can sit on a chair.

youdao

我做手势示意他坐椅子。

I waved him to a chair.

youdao

“坐椅子”常常是由于骑手想把脚跟向下推造成的。

Often the chair seat is caused by the rider trying to push his heels down.

youdao

I think even if you're in a chair, and you're sitting up straight with good posture, maybe hands on knees.

哪怕只是坐在椅子上，坐直并保持良好姿势，也许双手放在两膝上。

普林斯顿公开课 - 人性课程节选

So, when you see this object over here you categorize it as a chair and you recognize that you could probably sit on it.

当你看到这边的这件物体,你就把它划到椅子的类别下,然后你就知道你可以坐上去。

耶鲁公开课 - 心理学导论课程节选

We're familiar with polymers, plastics in our daily life; the chairs that you're sitting on are made of a kind of a plastic polymer that is basically an organic chemical that is cross-linked together.

我们应该很熟悉聚合物,比如日常生活中的塑料就是,你们坐的椅子,就是由一种塑料聚合物构成,它由基本的有机化学物质交联在一起

耶鲁公开课 - 生物医学工程探索课程节选