成了暴力和堕落代名词的地区用英语怎么说？

成了暴力和堕落代名词的地区

...a region that had become a byword for violence and degeneracy.

region

n. 地区，地域，地带，行政区，管辖区，（大气，海水等的）层，界，境，（学问等的）范围，领域；

例句
During the Soviet era and its immediate aftermath, the region was officially known as 'Middle Asia and Kazakhstan'.
在苏联时代和紧随其后的一段时期，该地区的官方名称为“中亚和哈萨克斯坦”。

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

become

vi. 变为，成为，变得，变成；vt. 适合，适宜，相称，相当，变成，发生；

例句
...abandoned buildings that become a breeding ground for crime.
沦为了犯罪温床的弃置楼群

byword

n. 格言，谚语，笑柄，代名词；

例句
...a region that had become a byword for violence and degeneracy.
成了暴力和堕落代名词的地区

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

violence

n. 暴力，强暴，暴虐，猛烈，激烈，歪曲（事实），曲解（意义），冒渎，不敬；

例句
He was a man who abhorred violence and was deeply committed to reconciliation...
他是一个憎恶采用暴力而坚决主张和解的人。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

degeneracy

n. 堕落，退化，退步；

例句
...the moral degeneracy of society.
社会的道德堕落