后来他去了美国，努力工作并取得成功，以此回报他所获得的善待。
The boy later went to America, became successful and worked hard to repay the kindness he had received.
美国在燃烧废旧塑料利用热能，热分解提取化工原料等方面进行了大量工作并取得了一些成果。
The United States in burning waste plastic, using heat decomposition extraction chemical raw materials and other aspects of the massive work and achieved some results.
美国在燃烧废旧塑料利用热能，热分解提取化工原料等方面进行了大量工作并取得了一些成果。
The United States in burning waste plastic, using heat decomposition extraction chemical raw materials and other aspects of the massive work and achieved some results.
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