<正>This hot summer,I visited the Zhenjiang Science and Technology Museum(镇江市科技馆)."Wow!Mum!Look!A big Yangtze River Dolphin (白鱀豚)!"I said in surprise when we went inside.It was pieced together (组装)with a lot of plastic buckets (塑料桶).This artwork was environmentally friendly.What a good idea!