Intrapopulation
a. 人口内部的,居民内的, 人口成员之间的,居民间发生的
🗣️ 情景例句
I've known Martin for years.
我认识马丁好多年了。
I did composition last month.
我上个月做作文。
since ground stations and satellites cannot see everywhere.
因为地面工作站和卫星不可能看到地球上的每一个地方。