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I mean to call on you, but I was so busy.

我是想来看望你的，但是我太忙了。

In our times, with the energetical improvement of scientific and technological progress and social productivity, the human society, while creating unprecedented material wealth, population increases severely, ecological disruption, resources loss, problems such as the environmental pollution,etc.

当今世界，随着科技进步和社会生产力的大力提高，人类社会在创造前所未有的物质财富的同时，人口剧增，生态破坏，资源损耗，环境污染等问题也日益突出严重的阻碍经济的发展和人们生活质量的提高。