The Indians cut notches on a stick to keep count of numbers.印第安人在棒上刻V形 凹痕用来计数.I've bought so many books this year that I can hardly keep count of them.今年我买了很多很多书,连我自己也不知道到底有多少.Keep count of your return visits to our...
Most of our listeners are in the 25-39 demographic.我们的大多数听众都属于25至39岁这个年龄段。But the demographic it's targeted at is very technology - savvy.但是人口统计旨在科学的调查.The demographic transition is thus, in part, a pure accident.因此...