So you saw in a striking example of where friction helped us to balance, and now I want to discuss an object that is hanging and that can freely swing due to gravity.

这就是著名的靠，摩擦力平衡的例子，现在我想讨论一个，可以在重力作用下，自由摆动的悬挂物体。

youdao

A child on a swing looked up at the scream and saw something like a small boy rolling and holding and falling fast through the branches of the pine tree.

一架荡秋千上，有一名孩子抬头朝尖叫声发出的地方看去，看到似乎有一名小男孩在松树的树枝当中翻滚、抓住树枝、迅速下落。

youdao

I saw a monkey swinging on the swing.

我看见一只猴子在秋千上摇摆。

youdao

"I farmed most of my life," "and I can point to any number of weeks when I saw more than a seven percent swing in my costs.

VOA: standard.2009.12.12

He directed attention to the gold standard and saw a dramatic swing in his standing.

FORBES: The Newt Gingrich Swing: For The Fences

This morning Pasadena, CA based regional bank East West Bancorp ( EWBC) reported second quarter earnings that saw the company swing to a profit.

FORBES: Price Might Be Right On East West Bancorp

That saw the momentum swing back as the Dragons forwards made the most of their extra man to carve out space for Sweeney to cross.

BBC: Perpignan 23-19 Dragons