全世界几乎有一半的人口，每天仅靠2美元甚至更少来维持生活。
Nearly half the world's population lives on $2 per day or less.
更多的人口则意味着更多的住房，意味着更少的耕地。
More people mean more houses, which means less land to grow crops.
德国人喜欢随上随下高速列车的其中第一个原因是站与站的距离要比法国短，法国的人口更分散，大城市更少。
One of the reasons for the German preference for hop-on, hop-off high-speed trains is that stage lengths are shorter than in France, where the population is more spread out, with fewer big towns.
应用推荐