自20世纪70年代以来，美国边际税率的下降使得延长工作时间更有利可图。

Falls in marginal tax rates in America since the 1970s have made it all the more profitable to work longer.

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“可与之相比的就是20世纪90年代有关加密的争夺战，”库尔特·奥普萨尔说道，他是隐私监督组织电子前沿基金会的法律总顾问。

"A comparison point is in the 1990s battles over encryption," said Kurt Opsahl, general counsel of the Electronic Frontier Foundation, a privacy watchdog group.

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动物化石可鉴定的有10个种属，均属于中国东北更新世晚期猛犸象—披毛犀动物群成员。

There are at least 10 species Paleontology fossils, members of Mammuthus-Coelodonta groups in late Pleistocene in northeast of China.

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Suppose somebody said, "Yeah, it's true if I thought about the nature of death, the fact that the 50, 80, 90 years I've got on this Earth is all I'm going to have.

假设有人说，“没错如果我考虑了死亡的本质，我还有50，80，90年存活于世,我还有这么多年可活这个事实。

耶鲁公开课 - 死亡课程节选