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Ⅰ. Sustainable development is applied to just about everything from energy to clean water and economic growth, and as a result it has become difficult to question either the basic assumptions behind it or the way the concept is put to use. 【翻译】可持续发展被应用到各个领域，从能源到清洁的水到经济发展。因此，很难去怀疑其背后的基本假设或者想法被付诸实践的方法。 【词汇】1. sustainable a.可持续的 例：Sustainable development is the common target of humans. 可持续发展是全人类的共同目标。 2. be applied to 被应用于 3. question v. 对表示怀疑，询问 例：The teacher will question us on nouns. 老师将提问我们关于名词的知识。 4. assumption n. 假定，设想 例：The theory is based on a series of wrong assumptions. 这个理论是建立在一系列错误的假定之上的。 5. concept n. 概念，想法 例：the concept of social class 社会等级的概念 6. put +n. +to use 将付诸实践，利用 Ⅱ. Whats more, demand for animal products in developing countries is growing so fast that meeting it will require an extra 300 million tons of grain a year by 2050. | 
