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TOEFL IELTS BNC: 15275 COCA: 12794
epoch
iːpɒk ˈiˌpɑk epək ˈɛpək ˈɛpˌɑk
Word forms: plural epochs
1 N-COUNT 时代;纪元 If you refer to a long period of time as an epoch, you mean that important events or great changes took place during it. 时代;纪元

  • The birth of Christ was the beginning of a major epoch of world history.

    基督诞生是世界历史上一个重要纪元的开端。

SYN era, time, age, period
2 N-COUNT [usually supplement NOUN] （地质中的）世，纪，期 An epoch is a very long period of time in the earth's development, marked by particular physical or biological characteristics. （地质中的）世，纪，期 [technical]

  • Two main glacial epochs affected both areas during the last 100 million years of Precambrian times.

    在前寒武纪的最后1亿年中，两个主要的冰川时期对两个地区都产生了影响。

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