桌上东西码好了，他就把牙钻拉到牙科椅边上，坐上椅子磨起假牙来。

When he had things arranged on the table, he pulled the drill toward the dental chair and sat down to polish the false teeth.

youdao

旁边的椅子小一点儿，但太软了。第三把椅子刚刚好。她坐上椅子，椅子腿儿却断掉了。

The next chair was smaller, but too soft. The third chair was just right. She sat down with a flop, and the chair legs gave way.

youdao

孩子的身后是一条臭秽的过道，他的小椅子椅面裂了道缝儿，一坐上去就微微下陷。

Behind the child was a stinking corridor, and his little chair, splitting across the bottom, sank a little beneath his weight.

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