许多文化变革发生在二十世纪末期。

Many cultural changes happened at ___the ___tail ___end ___of the twentieth century.

她的研究聚焦于殖民时期的尾声。

Her research focuses on ___the ___tail ___end ___of the colonial period.

我只看了电影的结尾部分，所以错过了关键情节。

I only saw ___the ___tail ___end ___of the movie, so I missed the key plot points.