我们生活周围大声飞机、卡车和电动工具。

We live surrounded by loud planes, trucks and electric tools.

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安装之前，使用手动和电动工具，焊接设备，组装机械设备。

Assemble machinery and equipment prior to installation using hand and power tools and welding equipment.

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木工学专业学习利用手工和电动工具制造，安装和修理木制品。

Carpentry majors learn how to use hand and power tools to construct, install, and repair wooden structures and fixtures.

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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。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选