He took a metal ring off his arm.

他从手臂上取下了一个金属环。

Push rims are metal rings attached to the chair that help make it much easier to push.

推轮是连接在轮椅上的金属环，可以让它更容易推动。

Place the metal ring on top of the pineapple over the core and then push down.

将金属环放在菠萝顶部的核心上方，然后向下推。

The thin metal rings I wore around each ankle jingled noisily, but I stamped my foot again.

我戴在每个脚踝上的薄金属环发出响亮的叮当声，但我又跺了跺脚。

It has three metal rings – three circles – inside of it that you can use to put paper into, and hold paper.

它的内部有三个金属环（三个圆圈），您可以用它们来放入纸张并固定纸张。

And, these metal rings are used typically by the police to make sure the person doesn't use their hands in trying to escape.

而且，这些金属环通常由警察使用， 以确保该人不会用手试图逃跑。

Rudolf tried to sail his boat into the calm place. At last he did, he tied the boat to metal ring that was stuck in the rocks.

鲁道夫试图把他的船驶到平静的地方。最后，他把船系到卡在岩石上的金属环上。