标签：话题作文 话题 大学英语作文
字数：1000字
提要：Energy Energy makes the world go, It is indispensible to both animal life and human life. We get heat energy from the food we eat, light energy from the sun and electricity from water. In the hot summer when there ia a power outage we feel all the more the need for electric energy which powers the electric fan md air-conditioner. There are different sources of energy. The rivers and streams are a ..