人口的地域分布所发生的变化changes taking place in the spatial distribution of the population中国地域辽阔,人口众多China has a vast territory and a large population.亚历山大曾统治过辽阔的地域.Alexander held dominion over a vast area....
Professors are passing the hat to help staff in their department.教授们正在凑钱帮助系里的同事。Professors, for the most part, are firmly committed to teaching, not research.大多数教授都投身于教学，而不是研究。Professors are notoriously difficult to mana...