解决方案是：设定优先顺序，把每件物品的年度成本加起来，然后考虑用同样的钱她还能买到什么。
The solution—set priorities, add up the annual cost of each item, then consider what else she could buy with the same money.
同样地，用食指和大拇指围成一个圈的表示 OK 的手势，在法国表示“零”，在日本表示“钱”。
Likewise, a sign for OK, forming a circle with our forefinger and thumb, means zero in France and money in Japan.
用同样的钱，英国可以将全部的发电机容量替换为太阳能电池板，并减少三分之一的排放。
For the same money, Britain could replace its entire power-generation stock with solar cells and cut its emissions by a third.
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