75．Their distrust was caused，in part，by a national ideology that proclaimed farming the greatestoccupation and rural living superior to urban living.

(that引导的从句作ideology的同位语)

他们的这种不信任部分是由一种全民性的思想意识引起的，这种意识宣称耕作是最伟大的职业，乡村生活优于城市生活。

分句1. Theirdistrust was caused，in part，by a national ideology

分句2. thatproclaimed farming the greatest occupation and rural living superior to urbanliving•

1和2嵌套

2是1中a national ideology的同位语从句。