From VOA Learning English, this is the Technology Report. Experts say that sun and wind are the richest sources of clean, renewable energy. But ocean waves also create powerful, clean energy. So, the U.S Department of Energy has announced a $1.5 million-dollar prize for the winner of a competition on how to capture that energy.______________________________ 这里是美国之音科技报道.专家表示太阳和风是清洁可再生能源最富裕的资源.但是海浪也能创造强大的清洁能源,所以,美国能源部宣布将悬赏150万美元奖励善用海浪能源竞赛的获胜者._____________________________
