half的用法？aboutthreehundredyearsago,therewereapproximatelyhalfabillionpeopleintheworld.请问half是在这里是怎么意思的呢？

Question

half的用法？
about three hundred years ago, there were approximately half a billion people in the world.
请问half是在这里是怎么意思的呢？

Answer 1

一半。
half a billion people : 5亿人
类似的用法还有： half an hour: 半小时。