“如果你把随身听耳塞当成一种掩盖环境声音的方式，那就是太响了”，劳赫博士指出。

"If you use iPod earbuds as a way of masking out environmental sound, it's probably too loud," Dr. Rauch said.

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Kanwal实验室发现蝙蝠的脑细胞在环境声音非常嘈杂的情况下，反而能更好地探测交流音。

Kanwal's lab found brain cells in bats that actually did a better job of detecting communication sounds when there was a lot of background noise.

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ERDC - CERL正在调查“寂静阵营”，在那里，传统的能量产品与安静的、环境声音燃料电池技术综合起来。

ERDC-CERL is investigating a 'Silent Camp,' where traditional power production is integrated with quiet, environmentally sound fuel cell technology.

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And what this is in a very general sense is the learning of an association between one stimulus and another stimulus, where stimulus is a technical term meaning events in the environment like a certain smell or sound or sight.

一般来说,经典条件作用是指在一个刺激,和另一个刺激之间形成联结，这里的刺激是一个专业术语,意思是环境中出现的事件,比如某种味道，声音或景观。

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