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Today, the planet is a tipping point, the environment of cities is becoming worse and worse. Efforts to improve the environment are growing, it has a long way to go especially in mordern cities. The Shanghai Expo is teeming with unique designing ideas of Shanghai Expo.
现如今，地球正处于一个转折点，城市的环境正变得越来越糟。人们正在逐渐努力以改善环境，但是在现代城市，则有很长的路要走。上海世博会设计理念独具匠心而且热闹非凡。
词语解释：
1. teeming a. 拥挤的;热闹的
2. unique a. 独一无二的
