But man is the only one that depends for its very survival on the things he has made.
虽说能制做东西的动物不少，但能利用自己的制做求生存的，只有人类。
But a whisper is a small thing. I'm a man of small things, but all the world is made of small things.
嘀咕也是小事儿，我是一个无足轻重的人，但整个世界就是由一堆小事儿组成的。
The man-made sort can do things like transmit music or heat food in a microwave. At the low end of the spectrum are the frequencies used for things like television and mobile phones.
人造无线电波有多种用途，如传送音乐或者运用微波加热食物，频谱低端的频率可以使用在诸如电视和移动电话等设备上。
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