农业革命实际上是有益的；我们通过阻止冰河世纪的到来，使气候变得更好。
The agricultural revolution which actually was beneficial; we altered the climate for the better by preventing an Ice Age.
尽管对某些人来说这听起来有点傻气，但我们确实相信加快教育的节奏能够使世界变得更好。
Silly as it may seem to some, we really believe speeding up the pace of education in the world makes it a better place.
对不起得罪了，素食主义者们，但是吃肉显然使我们的祖先变得更聪明 - 聪明得能做出更好的工具，从而导致其他的变化，艾洛说。
Sorry, vegetarians, but eating meat apparently made our ancestors smarter — smart enough to make better tools, which in turn led to other changes, says Aiello.
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