这是莫斯科市民对人民力量史无前例的证明。

It was an unprecedented demonstration of people power by the citizens of Moscow.

《柯林斯英汉双解大词典》

这一警报是由北极地区史无前例的事件所引发的。

The alarm is caused by unprecedented events in the Arctic.

youdao

巴基斯坦史无前例的洪水夺去了两千万人的生命，也影响了这个国家蜘蛛的数量。

The unprecedented flooding in Pakistan disrupted the lives of 20 million people, but it also affected the country's arachnid population.

youdao

But Athens was also something completely unprecedented in the world it was a democracy.

但雅典也是,世界上史无前例的城邦。

耶鲁公开课 - 政治哲学导论课程节选

He added celebrity gossip too, which The London Times would never do in the past.

他还史无前例地加入了名人八卦,这是《泰晤士报》过去永远不会做的

耶鲁公开课 - 金融市场课程节选

So we created this on-site service program for servicing PCs, which had never been done before.

所以在PC服务方面,我们开启了现场服务项目，这是史无前例的。

斯坦福公开课 - 戴尔CEO-Michael.Dell谈创业和发展课程节选