She's in a horizontal or resting position.

她处于水平或休息的姿势。

It's to put something down in a resting position.

它是指把东西放在一个静止的位置上。

So 'lie' means be horizontal here, be in a resting position and the past form is lay.

所以 lie 在这里的意思是平躺，处于休息的姿势，过去式是 lay。

To get started, place your violin in rest position.

首先 先把小提琴拿好。

First of all, the position of Thrinaxodon's forelimbs, to the side of its skull, looks like a natural resting position.

首先，Thrinaxodon 的前肢在其头骨一侧的位置看起来像是一个自然的休息姿势。

Because with the scroll wheel on a mouse, your hand never had to leave its resting position, you just scroll to see the next thing.

因为有了鼠标上的滚轮，你的手永远都不必离开起始位置，只需滚动手指就能看到下面的内容。

And so the only way you can actually get this thing to come out of that rest position is if you have a net force, an unbalanced force.

因此, 使物体由静止开始运动的唯一方法就是施加一个非零净力 -- 非平衡力.