For an indefinite period from here on，mankind is going to advance cautiously, and consider itself lucky that it can advance at all.在今后的漫长的时间内，人类将谨慎前进，而它感到幸运的是它确实能够前进。
Never give up any opportunity to make progress!
We, never met, always love in mind!
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四六级考研复习中的困惑
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To make the situation worse，there is as yet no sign that any slowing of the world’s population is in sight. Although the birthrate has dropped in some nations，including the United States，the population of the world seems sure to pass six billion and perhaps even seven billion as the twenty-first century opens.to make sth worse 使得。。。更糟糕的是any slowing of the world’s population 世界人口的（增长）变缓as the twenty-first century opens 在21世纪初To make the situation worse，there is as yet no sign that any slowing of the world’s population is in sight. Although the birthrate has dropped in some nations，including the United States，the population of the world seems sure to pass six billion and perhaps even seven billion as the twenty-first century opens.
使目前状况糟糕的是，至今尚无迹象表明，世界人口的增长在近期内会减慢。虽然包括美国在内的一些国家的出生率已经下降，但是在21世纪初世界人口似乎肯定会超过60亿，或许甚至超过70亿。
1. 首句主干：there is as yet no sign；修饰成分：to make the situation worse 修饰整句话；that any slowing of the world’s population is in sight 为同位语从句，表示sign的具体内容。
2. 二句主干为：the population of the world seems sure to pass six billion and perhaps even seven billion。修饰成分：although 引导让步状语从句；including the United States 修饰some nations；as the twenty-first century opens 为时间状语
The food supply will not increase nearly enough to match this，which means that we are heading into a crisis in the matter of producing and marketing food.
