例句
A micrometer is one thousandth of one millimeter.
一微米是一毫米的千分之一。
The light, about one thousandth of the amount needed to read by, is just a start.
光线,大约是阅读所需数量的千分之一,仅仅是一个开始。
Failure I may still encounter at the thousandth step.
纵使走上一千步,我依旧会遭遇失败。