It's a time of technological innovation, tremendous technological innovation, so much technological change that half the time it frightened people.

这还是个技术革新的时代,空前的技术革新,如此多的技术涌现,以至于人们有时候是对其感到恐惧的

耶鲁公开课 - 美国内战与重建课程节选

That explains, in large part, why there was such a decline in population, why the Dark Ages were so dark, lots of poverty, lots of starvation, but also, as I suggested when I spoke of this earlier, also the freedom if you could make it, to learn and also to grow stronger.

这解释了,在绝大部分地区,为什么存在着这一类的人口消减,为什么黑暗时代如此黑暗,如此贫困,如此多的饥荒,但是同时,就如在我之前所提到的,同样可以,如果做得到的话,去学习以及使自身强大

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And what was known about alpha particles at the time is that they were these charged particles and that they were very heavy.

当时对alpha粒子的理解,是它们是带电的而且非常重，有谁知道的,比Rutherford时代的多吗。

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