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This map shows the top cities in the world. 这张地图展示了世界上（生活费用指数较高）的城市。 The color of the markers corresponds with the Cost of Living in the city. Red markers show more expensive cities, green ones show cheaper cities. 这些彩色标记与各个城市的生活费用是相对应的，红色的标记表示了生活费用较高的城市，而绿色的则表示了生活费用较低的城市。 The size of the markers correspond with the population of each city. 这些标记的大小则是与各城市的人口数量相对应。 What is the Cost of Living Index? To calculate each cities' Cost of Living Index value, we start by assigning a value of 100 to a central reference city (that happens to be Prague). Once the reference point has been established, the Price Index value of every other city in the database is calculated by comparing their cost of living to the cost of living in Prague. 什么是生活费用指数？为了统计出各城市的生活费用指数值，我们在一开始给一个中心参照城市设定了100的值（这个城市刚好是布拉格）。在定下参照值之后，数据库里每个城市的物价指数值就能通过比较它们与布拉格的生活成本来统计了。 Therefore, if a city has a Price Index of 134, that means that living there is 34% more expensive than living in Prague. 因此，如果一座城市的物价指数是134，那就意味着住在那里的生活成本要比布拉格高出34%。 | 
