One afternoon when my uncle and I were lying on the beach listening to MP3, we suddenly heard someone was crying for help. We jumped up quickly, and saw a little boy waving his hands in the air. My uncle took off his shirt at once and jumped into the water. He swam fast to the little boy, and took him back to the beach at last. I had never thought he was such a good swimmer!
有一天下午我和叔叔正躺在沙滩上听MP3，突然听到有人呼救。我们迅速跳起身来，看见一个小男孩的手在空中挥动。我叔叔立刻脱下衬衣跳到水里。他很快游向那个小男孩，最后把他救到海滩。我从来没有想到叔叔游泳这么棒！

词义解析：

1.lay：躺（现在分词：lying）
2.beach：沙滩
3.suddenly：突然
4.hear：听到（过去式：heard）
5.jump：跳
6.quickly：迅速地
7.wave：挥动
8.shirt：衬衫
9.swim：游泳（过去式：swam）
10.think：想（过去式：thought）

词组解析：

1.take off：脱下
2.at once：立刻
3.at last：最后