They have not evolved to tolerate some of the man made sounds that have very unusual and unnatural physical characteristics. These sounds are for example explosives, industrial noise, musical instruments, power tools, and headphones.

还没有进化到能忍受,某些怪异，超出常规的人为声响,如爆炸，工业噪音,乐器，电动工具和耳机等等。

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We are barely beginning to understand our instruments, our tools, in social business.

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The bank, he said, was "looking at various instruments, various tools" beyond interest lower rates and "thinking 360 degrees" on new tactics.

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Mobile payments use a mobile device and various payment tools including bank instruments such as checking and prepaid accounts.

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