One millimetre (or the diameterof the head of a pin) is equal to one-million nanometres.
1毫米(或一个大头针头部的直径)等于一百万纳米。
2
A mid-song sound that Dr Koren and Dr Geffen dubbed “chucks” communicates size (body length and headdiameter) and also level of stress (as measured by cortisone levels).