There was a square hole just large enough for my father to fit into if he pulled his knees up to his chest.

船尾那里有一个方孔，大小只够我父亲膝盖顶着下巴挤进去。

youdao

She curled up in a tight ball, with her knees tucked up at her chin.

她蜷缩成紧紧的一团，膝盖顶着下巴。

《柯林斯英汉双解大词典》

The mud came up to his knees.

泥浆已达他的膝盖。

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

In, over my life? Oh my gosh! I hope a long time, but I think my knees are probably going to give up.

我的一生吗？天啊，我希望我能跑很久很久，但我想我的膝盖可能受不了。

在马拉松认识的朋友 - SpeakingMax英语口语达人

Normally, visitors to this ski resort seek nothing more dynamic than pumping knee-deep powder snow or perhaps enjoying a knees-up in one of Davos's nightclubs.

BBC: Davos 2013: 'Dynamic resilience' in a volatile world

Ford doesn't have any concerns about her knees holding up to the rigors of playing in the WNBA in the summer on the heels of a winter season in Europe.

WSJ: Ford eyeing title in return to WNBA with Liberty

Now and then she would raise herself into a sitting position and then spend a long time with her knees drawn up while she painted her nails or, with a small hand mirror, scrutinized herself for blemishes or unwanted hair.

NEWYORKER: While the Women Are Sleeping