以前人们认为地球是平的，所以人类从未征服过地球。
Believed to be flat, the earth was never conquered by human beings.
然而在以前的研究中并没有发现在人类皮肤上有同样的作用。
However, no prior study had looked at the effect it may have on human skin.
以前几乎没有在这个时期内的人类饮食状况的直接证据。
Little direct evidence of human diet has been found from this time period.
人们已经知道很久以前人类是什么样子的。
那是亚历克斯·德拉古列斯库给这些暗中为害的人类作品以视觉表达以前的事了。
That was until Alex Dragulescu gave these insidious human creations visual expression.
他们很久以前就是人类的朋友了。
灵梦：很久以前，这类的书在人类世界很流行。
Reimu: Long time ago, that kind of story was popular in the humans world.
人类在技术的帮助下过上了比以前更好的生活。
With the help of technology, human beings are living much easier lives than ever before.
很久以前动物就是人类的朋友。
以前，人们并没有发现这种猪的流感会在人类之间传播。
Ago, people did not find this pig influenza would be spread between humans.
以前从不会把这个能力交予人类的。
宇宙航行员在月球上所冒的危险，是人类以前从来没有遇见的。
The astronauts faced risks on the moon never before met by man.
野生动物以前住的地方被人类剥夺去了。
The land where the wild animals live was deprived by human being.
很久以前，人类行为被认为是非理性的，甚至似乎是不合理的。
Since long time ago, human behavior was thought as irrational, even not quasi-rational.
现在，人类对动物的依赖性可能不像以前那么大了。
现在，人类对动物的依赖性可能不像以前那么大了。
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