火和夏日都热,冰淇淋和冬夜都冷。热和冷是由同一种东西造成的,即“热量”。冷的物体就比它热时包含了较少的热。你的身体温暖,是因为它包含了很多热。如果你钻进冰冷的湖水,你就会失去一些热。热使我们以及一切生物得以生存。没有热,我们的肌体就不能工作。我们需要用热做饭、取暖。太阳以及我们所吃的食物给了我们需要的热。 Fire and summer are hot, ice cream and winter nights are cold. Heat and cold are caused by the same thing, that is, “heat”. A cold object contains less heat than it does. Your body is warm because it contains a lot of heat. If you get into a cold lake, you lose some heat. Heat makes us and all creatures alive. Without heat, our bodies can not work. We need to cook with heat and keep warm. The sun and the food we eat gives us the heat we need.