牙形刺最早出现于大约5亿年前，就在恐龙开始登上历史舞台时灭绝了。
Conodonts first emerged around 500 million years ago and died out just as dinosaurs were beginning to take shape.
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.
魏晋之际随着社会由乱世向相对治世的转变，礼法派开始取代名法派而登上历史舞台。
At the turn of the Wei and Jin Dynasties, along with the change of the society from turbulent times to times of peace and prosperity, Li-Fa School began to replaced Ming-Fa School.
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