Exchanges are required to process trades in microseconds ( millionths of a second ) .

交易所的交易所用时间须以微秒（百万分之一秒）计数。

Nanocrystals , also known as quantum dots , are semiconducting particles with a diameter of a few millionths of a millimetre .

纳米晶体（也被称为量子点）是一些半导体粒子，其直径为几百万分之一毫米。

All the nuclear weapons in the world , on the other hand , could only power the sun for a few millionths of a second .

而从另一方面来说，全世界所有的核武器也只能供太阳燃烧几百万分之一秒。

The trigger system also registers the location of particles to millionths of a metre

触发系统也能以百万分之一米的精度记录粒子的位置。

The width of the circuitry on a medfield chip is a mere 32 nanometres ( nm ) , or millionths of a millimetre .

一个medfield芯片电路系统的宽度仅为32纳米，即一毫米的百万分之一。