To many Americans, neglecting human space flight this way looks like a sorry end to the glorious chapter Kennedy opened half a century ago.
对许多美国人而言,以这样一种方式忽略掉载人飞行相对于半世纪前肯尼迪时代的光辉篇章来说显得过于暗淡。
Half of the world's population could face food shortages by the end of this century due to climate change, a new study warned recently.
近日,一项最新研究警告称,由于受气候变化的影响,预计到本世纪末全球将有一半的人口面临粮食短缺的威胁。
And seen from this end of the century it's not hard to see why.
从本世纪末的目标中,就不难看出这是什么原因。
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