Think of a cat walking in the dark, with ninja-like movements, almost without making a noise.

想象一只在黑暗中行走的猫，它有忍者般的动作，几乎不不会发出任何声响。

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The noise is particularly pronounced when the headset or controllers are moving quickly. Like, say, when you're making a throwing motion!

当头盔或手柄快速移动的时候，噪声尤其明显。

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He ran down the avenue, making a noise like ten horse at a gallop.

他沿着大街跑，声音之响，犹如十马奔腾。

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Make consequences clear for violations like smoking on the property, making too much noise or sneaking in a banned pet.

WSJ: Weeding Out Deadbeat Renters��WSJ House Talk

He actually looked up at Richard Ins (the chair umpire) and was like hey, the crowd's making a noise, can I hit a first serve, and Richard told him no, and he stepped up and threw the double, double fault.

CNN: June 8, 2012 -- Updated 1951 GMT (0351 HKT)

They added that using a worm-like motion helped reduce the noise such machines produce, making them suitable "for reconnaissance purposes".

BBC: Pentagon helps build Meshworm reconnaissance robot