维多利亚时代是英国历史上一个重要的时期。

The Victorian era was a significant ___epoch in British history.

侏罗纪是中生代的一个地质时代。

The Jurassic ___epoch was a geological time unit in the Mesozoic era.

工业革命标志着一个新的历史纪元的开始。

The Industrial Revolution marked the beginning of a new ___epoch in human history.