I've pains in my back and my shoulders and knees.

我的背，我的肩膀，我的膝盖都在疼。

youdao

Head, shoulders, knees, and toes are parts of our body.

头，肩膀，膝盖和脚趾是我们身体的一部分。

youdao

This means your neck and spine should be in a neutral position, shoulders and torso relaxed, knees bent at 90 degrees with both feet flat on the floor.

这也就是说你的脖子和脊柱应该处于中正的位置，肩膀和躯干放松，膝盖弯曲呈90度角，双脚平放在地面上。

youdao

She was perfect: pink skin,large blue eyes and long golden hair that fell over her shoulders to her knees.

VOA: special.2009.07.25

At rehearsals and performances (when she is not playing soloist), she sits in the concertmaster's chair a pretend-first among equals and encourages her partners with her eyebrows, lips and chin, her shoulders and elbows, her nods and knees and toes and torso-swings, her grins and her frowns and her own soulful, aggressive performances.

WSJ: All Strings Attached | New Century Chamber Orchestra | By David Littlejohn

She has no male companion (Barbie has Ken) and modest clothing that covers her knees and shoulders.

ECONOMIST: Making money from believers

Their postures on the picnic table were both the same forward kind with their shoulders rounded and elbows on their knees.

NEWYORKER: Good People