纳米是一个微小的长度单位,1纳米等于10亿分之一米,即1nm=10-9m,它相当于原子大小的4倍,万分之一头发粗细.形象地讲,1纳米的物体放到乒乓球上,就像一个乒乓球放在地球上一样.1959年,著名物理学家、诺贝尔奖获得者理查德.费曼预言,人类可以用小的机器 Nano is a tiny unit of length, 1 nanometer is equal to one billionth of a meter, that is 1nm = 10-9m, which is equivalent to 4 times the atomic size, one ten thousandth the thickness of the hair. To table tennis, like a ping pong on Earth, as in 1959, the famous physicist, Nobel Prize winner Richard Feynman predicted that humans can use small machines