Without them, it would be a tough task to hold this un-precedent Olympic Games.

没有他们，这将会是一个艰巨的任务去完成这史无前例的奥运会。

youdao

The actions taken in Kosovo without UN authority did not constitute a precedent.

BBC: British Attorney General Lord Goldsmith

This presumptuous law undoubtedly sets the precedent of over-regulation in education as well as a thoroughly un-American presumption of guilt instead of innocence for teachers.

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