埃长度单位,等于一厘米的百万分之一(10 - 8),用来记录辐射波长。
The millionth new phone, however, adds not two or even two hundred but two million new potential calls, making the network even more attractive for the next million users, and the millions after that.但是如果增加的是第一百万部电话,那么增加的将不是2个甚或200个,而是200万个新的潜在电话,这使得网络对下个一百万用户更有吸引力,依此类推。