Study of the origins and distribution of human populations used to be based on archaeological and fossil evidence.

对人类种群起源和分布的研究曾是基于考古和化石证据。

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The copies of the data are determined to be fresh or stale based on the communication of invalidation messages.

系统将根据无效消息的通信确定数据副本是新鲜的还是陈旧的。

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If you make clinical predictions based on somebody's race, you're going to be wrong a good chunk of the time.

如果你根据某个人的种族做出临床预测，你非常可能出错。

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Instead,it will be based on a simple principle: whether a state is ready to do what works.

VOA: special.2009.07.30

You've always got to be reinventing what you're doing based on the technology and what's going on.

必需得创新,根据技术和时下局势创新。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选

Aristotle's distinction seems to be not only empirical again based on the factual distribution of powers.

亚里士多德的区别似乎,不只是根据经验的，或说,根据事实的权力分配。

耶鲁公开课 - 政治哲学导论课程节选

"Some school closures may be based on operational interruption due to a significant percentage of student and staff absences, while some school closures may be based on a recommendation of public health to reduce the virus spread, " the department said in a statement.

CNN: In time of swine flu, add sanitizer, tissues to school supply lists

Graduates already paid more tax through income tax, insisted Scottish Liberal Democrat education spokeswoman Margaret Smith, who said access to university education should be based on "ability to learn, not ability to pay".

BBC: Higher education debate

Argo is one of those stories that basically needs to be based on a true story to be believable.

FORBES: Ben Affleck Hits Another One Out Of The Park With 'Argo'