今天,天气格外好,万里晴空飘着朵朵白云。我们高高兴兴地在院子里玩耍。一会儿艳姐姐来了,她拿了两块冰对着阳光照,离冰块不远的地上放着一张纸。我觉得好奇怪,连忙走了过去,小伙伴们也都围拢过来。我看到纸上出现了一团亮点,非常刺眼,不久,奇迹出现了:纸由白变黄、变黑,最后燃起了一团火,我们都惊呆了。艳姐姐说:“将冰块做成半球镜的形状,用它集中太阳光,集聚起来的太阳光就能像火一样地使物体燃烧起来。” Today, the weather is exceptionally good, thousands of miles floating in the blue sky and white clouds. We are happily playing in the yard. Yan sister came a while, she took two pieces of ice against the sun, not far from the ice on the ground stood a piece of paper. I feel so strange, quickly gone in the past, small partners are also surrounded. I saw a bright spot on the paper, very dazzling, and soon, miracles appeared: the paper from white to yellow, black, and finally ignited a fire, we are shocked. Yan sister said: “The ice into a hemispherical mirror shape, use it to concentrate the sun, the sun will gather together as fire can make the object burn up.”