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For years now,calories have been all the rage(风靡一时的事物,时尚)—people are countingthem and cutting them.But have you ever wonderedwhat exactly a calorie is?Q:What is a calorie?A:A calorie is a unit of energy.Specifically,acalorie is the amount of energy,or heat,it takes to raisethe temperature of 1 grain of water 1 degree Celsius.One calorie is equal to 4.184 joules(焦耳),a commonunit of energy used in the physical sciences.We tend to associate calories with(将……与……联系在一起)food,but they apply to anything
For years now, calories have been all the rage -people are countingthem and cutting them.But have you ever wonderedwhat exactly a calorie is? Q: What is a calorie? A: A calorie is a unit of energy.Specifically, acalorie is the amount of energy, or heat, it takes raisethe temperature of 1 grain of water 1 degree Celsius.One calorie is equal to 4.184 joules, a commonunit of energy used in the physical sciences. We tend to associate calories with (to associate ... with ...) food, but they apply to anything