2017全球生活成本最贵城市TOP10：香港第8
<p><span word="This">This</span> <span word="map">map</span> <span word="shows">shows</span> <span word="the">the</span> <span word="top">top</span> <span word="cities">cities</span> <span word="in">in</span> <span word="the">the</span> <span word="world">world</span>.</p><p>这张地图展示了世界上（生活费用指数较高）的城市。</p><p><span word="The">The</span> <span word="color">color</span> <span word="of">of</span> <span word="the">the</span> <span word="markers">markers</span> <span word="corresponds">corresponds</span> <span word="with">with</span> <span word="the">the</span> <span word="Cost">Cost</span> <span word="of">of</span> <span word="Living">Living</span> <span word="in">in</span> <span word="the">the</span> <span word="city">city</span>. <span word="Red">Red</span> <span word="markers">markers</span> <span word="show">show</span> <span word="more">more</span> <span word="expensive">expensive</span> <span word="cities">cities</span>, <span word="green">green</span> <span word="ones">ones</span> <span word="show">show</span> <span word="cheaper">cheaper</span> <span word="cities">cities</span>.</p><p>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。</p><p><span word="The">The</span> <span word="size">size</span> <span word="of">of</span> <span word="the">the</span> <span word="markers">markers</span> <span word="correspond">correspond</span> <span word="with">with</span> <span word="the">the</span> <span word="population">population</span> <span word="of">of</span> <span word="each">each</span> <span word="city">city</span>.</p><p>这些标记的大小则是与各城市的人口数量相对应。</p><p><span word="What">What</span> <span word="is">is</span> <span word="the">the</span> <span word="Cost">Cost</span> <span word="of">of</span> <span word="Living">Living</span> <span word="Index">Index</span>? <span word="To">To</span> <span word="calculate">calculate</span> <span word="each">each</span> <span word="cities">cities</span>' <span word="Cost">Cost</span> <span word="of">of</span> <span word="Living">Living</span> <span word="Index">Index</span> <span word="value">value</span>, <span word="we">we</span> <span word="start">start</span> <span word="by">by</span> <span word="assigning">assigning</span> <span word="a">a</span> <span word="value">value</span> <span word="of">of</span> 100 <span word="to">to</span> <span word="a">a</span> <span word="central">central</span> <span word="reference">reference</span> <span word="city">city</span> (<span word="that">that</span> <span word="happens">happens</span> <span word="to">to</span> <span word="be">be</span> <span word="Prague">Prague</span>). <span word="Once">Once</span> <span word="the">the</span> <span word="reference">reference</span> <span word="point">point</span> <span word="has">has</span> <span word="been">been</span> <span word="established">established</span>, <span word="the">the</span> <span word="Price">Price</span> <span word="Index">Index</span> <span word="value">value</span> <span word="of">of</span> <span word="every">every</span> <span word="other">other</span> <span word="city">city</span> <span word="in">in</span> <span word="the">the</span> <span word="database">database</span> <span word="is">is</span> <span word="calculated">calculated</span> <span word="by">by</span> <span word="comparing">comparing</span> <span word="their">their</span> <span word="cost">cost</span> <span word="of">of</span> <span word="living">living</span> <span word="to">to</span> <span word="the">the</span> <span word="cost">cost</span> <span word="of">of</span> <span word="living">living</span> <span word="in">in</span> <span word="Prague">Prague</span>.</p><p>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。</p><p><span word="Therefore">Therefore</span>, <span word="if">if</span> <span word="a">a</span> <span word="city">city</span> <span word="has">has</span> <span word="a">a</span> <span word="Price">Price</span> <span word="Index">Index</span> <span word="of">of</span> 134, <span word="that">that</span> <span word="means">means</span> <span word="that">that</span> <span word="living">living</span> <span word="there">there</span> <span word="is">is</span> 34% <span word="more">more</span> <span word="expensive">expensive</span> <span word="than">than</span> <span word="living">living</span> <span word="in">in</span> <span word="Prague">Prague</span>.</p><p>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%。</p>
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