The second root was the understanding of air pressure which came from Torricelli's work on early barometers.

第二个基础是由于托里切利在早期气压计方面的研究，人们对大气压已有所了解。

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The second root was the understanding of air pressure which came from Torricelli's work on early barometers.

第二个基础是由于托里切利在早期气压计方面的研究，人们对大气压已有所了解。

youdao