在他们登上历史舞台的时代，他们还很年轻。
They were young at the period of their entrance upon the stage of history.
第一波是工业实验室的出现并开始登上历史舞台的时期。
The first wave is the stage that emergence and beginning period of industrial laboratory made.
第一波是工业实验室的出现并开始登上历史舞台的时期。
The first wave is the stage that emergence and beginning period of industrial laboratory made.
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