one-fifth的翻译，读音

例句

Only one-fifth of air consists of oxygen. 氧气只占空气的五分之一。

one-fifth of total economic output is said to be informal. 五分之一的总经济产出据称是非正式的。

The layers are very thin-usually one-fifth or one-tenth of a millimeter. 这些图层非常薄，通常只有五分之一或十分之一毫米。

one-fifth were employed by state-owned enterprises and 17 percent worked for private firms. 五分之一进入国企，17%为私营业雇主工作。

China has long struggled to feed one-fifth of the world's population on 7% of the world's arable land. 的耕地努力地养育着世界上五分之一的人口。