lie flat on the back的意思|示意

Lie on your back, feet flat on the floor, knees bent, hands at your sides.

整个背贴着躺在地上，脚板放平在地板上，两手放在身体两侧。

Lie on your back with your knees bent and feet flat on the floor.

背部着地，两膝弯曲，足平放于地面。

For variation, the woman can even lie completely flat, face down on the bed with her legs open, as her partner lies on top of her back, entering from behind.

如果要有所变化，女性可以完全平躺着，面部朝下，双脚打开，由趴在她背部的伴侣从后面进入。

How it works: Lie flat on your back. Hold the book above your head and read until your arms are sore.

怎么做：平躺下，仰卧。把书举到头部上方看，直到胳膊酸痛。