Pups are less likely to make a noise if they think the returns will be low—for example, with carers that are stingy or in bad condition and thus have less food to spare.

如果幼仔认为回报不会多，它就不太可能吵闹。 例如，跟着吝啬或者因状态不佳所以能给的食物不多的看护者，幼仔就不太吵。

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If you do have headphones in, keep the volume low enough so you can still hear ambient noise around you.

如果走路用手机时戴着耳机，将音量调低，让自己能够听到周遭的声音。

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Have low noise, and create quiet and comfortable operational environment.

低噪音，创造安静、舒适的作业环境。

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"The aircraft had to be able to land and take off in 125 meters, it also had to have a very low noise output and the aircraft needed to be able to accelerate rapidly up to 350 mph in order to get point to point at low level very quickly, " said Avcen managing director Mike Dacre.

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Just like the dutch coffeehouses, and countless wall street bars, and stock message boards, Twitter is going to have either a low signal to noise ratio if you are being polite, and a lot of BS if you are not.

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Similarly, the full-frame sensor enabled low-light captures that would have yielded a fair amount of noise if shot on the RX100, and much of the time, I did appreciate having such a shallow depth of field at my disposal.

ENGADGET: IRL: Sony's Cyber-shot DSC-RX100 and the full-frame RX1