You can think of vital as a very short list of numbers that sums something up. Not all the numbers — just the few that tell you what state the thing is in. For a country that list is births, deaths and marriages. For a car or a phone it is size, weight and power. The shape is always the same: a whole subject squeezed into a handful of figures.
vital statistics 可以想成一份很短的數字清單，用來把一件事一次講完。不是全部的數字，只有最關鍵的那幾個。對一個國家來說，那幾個數字是出生、死亡、結婚。對一台車或一支手機來說，就是尺寸、重量、性能。形狀始終一樣：把一個龐大的對象，壓縮成手指數得完的幾個數字。認這個詞的時候，先看那幾個數字在量什麼，就知道是哪一種用法。
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