If you rap it with your knuckle, you hear the thwack of gypsum rather than the ring of cold metal.

如果用指关节击之，你能听见石膏的闷响，而非冷冰冰的金属发出的鸣响。

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Electricity, meanwhile, is delivered via a conductive brush that sweeps around a metal ring in the stationary base.

同时，固定地基上有一个(供电的)金属环，房子通过绕着此环旋转的导电刷来获得电能。

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Cut holes in the middle of both books, string them by a metal ring, neither of them can be read.

在两本书中间都切一个口，用一个金属环把它们串在一起，哪本都翻不开。

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When Dawn Giugliano woke up from an hour-long nap on a beach in Puerto Rico last year, the 27-year-old Long Islander claims she got quite a surprise: The metal ring attaching the cups of her Victoria's Secret bikini top had seared a mark in her chest.

FORBES: Magazine Article

It was reported that a migratory bird - a common European bee-eater - caused alarm in a village in south-eastern Turkey after it was found dead in a field with a metal ring around its leg stamped "Israel".

BBC: Quiz of the week's news