一个文化由如此之多的种族、民族和文化同时创建，这样的先例从未有过。
There is no previous example of a civilization that is being simultaneously created by so many races, nationalities, and cultures.
不仅历史上未有初登世界杯就夺得冠军的先例，历史还告诉我们，胜利者往往是老面孔。
Not only is this the first-ever World Cup not featuring a country making its World Cup debut, history also suggests that the victor will be a familiar face.
但人的才能从未有一个确定的衡量标准，我们也不能根据先例来判断他的能力，因为以前的尝试验证太少了。
But man's capacities have never been measured; nor are we to judge of what he can do by any precedents, so little has been tried.
飞机整机的任务可靠性预计国内尚未有先例。
It is the first time in our country that the airplane . mission reliability, is predicted.
潘在一篇文章中指出，“目前世界上从未有过水库引发8级大地震的先例。”
"There has never before been a case of a reservoir triggering an 8.0-magnitude earthquake in the world," Pan said in the article.
潘在一篇文章中指出，“目前世界上从未有过水库引发8级大地震的先例。”
"There has never before been a case of a reservoir triggering an 8.0-magnitude earthquake in the world," Pan said in the article.
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