难度呢，交替着来，同样霸气的句子，不用解释。上句子吧！
The increase in numbers of married women employed outside the home in the twentieth century had less to do with the mechanization of house work and an increase in leisure time for these women than it did with their own economic necessity and with high marriage rates that shrank the available pool of single women workers, previously, in many cases, the only women employers would hire.
词汇突破： have to do with… 与…有关
Economic necessity 经济需求
pool of single women workers 单身女工的资源
high marriage rates 高结婚率
主干识别： 在主干中出现了一个比较结构：
A had less to do with B and C than A did with D and E
A = The increase
B= mechanization
C= an increase
D= their own economic necessity
E= high marriage rates
并列中加不加with都是可以的；
(与其说A与BC 有关，还不如说与DE有关。)
其他成分: high marriage rates后出现定语从句
that shrank the available pool of single women workers, previously, in many cases, the only women employers would hire.
微观分析： the only women（whom） employers would hire.
The ONLY women = single women workers
同位语中加上一个定语从句其中whom被省略了。, previously, in many cases状语
