有两句话甚是不解啊

Cooperative apartment houses have the peculiar distinction of being dwellings that must also operate as businesses.

这句话怎么翻译啊 ？我看了答案也看不懂的说。

Where once the union had acquiesced to the prejudices of its English-speaking members by supporting the imposition of an alien tax on immigrant workers, after 1987 the United Mine workers made a determined effort to enlist Italians and Slavs in its ranks.

这句话也是看不懂的 。中文是什么意思啊 ？

谢谢牛牛

1。一点背景: co-op这种住宅形式不仅仅提供人们住所还要作为business来运作

2。由于工会支持对外来工人征alien tax, 她被公认为对来自说英语国家的会员偏袒，而在1987年，联合矿工会下了大决心征收意大利人和来自说斯拉夫语国家的人

问下这句话，为什么that不是修饰dwellings 的呢？

Cooperative apartment houses have the peculiar distinction of being dwellings that must also operate as businesses.