在英文中，“败类”一词的直译为“inferior class”，这是一个不太友好、带有贬损意味的词汇，表示某个人或群体被视为低于其他人或群体的存在。这个词的来源源于拉丁语的“infimum genus”，意思是“最下等的种类”。

例句：

These people are considered the inferior class, but they are just as valuable and deserving of respect as anyone else.

The superior class looked down on the inferior class and treated them with disdain.

Despite their best efforts, the inferior class could not escape the poverty and discrimination they faced.

请注意，“inferior class”是一个带有贬损意味的词汇，应该尽量避免使用。