To grow a kilogram of wheat requires around 1, 000 litres. But it takes as much as 15, 000 litres of water to produce a kilo of beef.
种植一公斤小麦需要大约1,000升水，但生产一公斤牛肉则需要15,000升。
To grow a kilogram of wheat requires around 1,000 litres. But it takes as much as 15,000 litres of water to produce a kilo of beef.
要种植出一公斤的小麦，需要1000公升的水，但是要生产出一公斤的牛肉，需要15,000公升的水，足足是小麦的15倍。
What most people think of as a calorie is actually a kilo-calorie: It takes one calorie to raise the temperature of 1 kilogram of water 1 degree Celsius.
很多人认为的一Calorie实际上是指一千卡：即指一千克水升高一摄氏度时所需要的热量。
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