4.Yet this other life has its interests， its enjoyments， its satisfaction， and， (at certain rare intervals)， a peaceful glow or a sudden excitement.
结构：只有1个谓语动词：has。its…， its…， its…， and a…or a…是并列结构，作为has的宾语。(at certain rare intervals)是插入语。
翻译：然而，这另一种生活也有其情趣、快乐、满足，而且也偶尔伴随着平静的喜悦或者突如其来的激动。
5.Our knowledge of social systems， (therefore)， (while it is in many ways extremely inaccurate)， is not likely to be seriously overturned by new discoveries.
结构：共有2个谓语动词，其中is not是主句的谓语动词。while引导的让步状语从句，作为插入语，分隔了主语和系动词。拆分为：
1) Our knowledge of social systems is not likely to be seriously overturned by new discoveries.
2) While it is in many ways extremely inaccurate.
翻译：因此，虽然在很多方面，我们对社会体制的认识极度不准确，但是这些认识并不能够被新的发现所正式推翻。
6.However， self-fulfillment is important to morality because unfulfilled citizens， (no matter how virtuous)， can not perform the duties morality assigns them.
结构：共有2个谓语动词，其中is是主句的谓语动词。because引导原因状语从句。(no matter how virtuous)是插入语，分隔了从句的主语和谓语。拆分为：
1) Self-fulfillment is important to morality.
2) Because unfulfilled citizens can not perform the duties morality assigns them.
翻译：然而，自我实现对于道德而言至关重要，因为没有自我实现的公民，无论多么有道德，都无法履行道德赋予他们的义务。
1) Our knowledge of social systems is not likely to be seriously overturned by new discoveries.
2) While it is in many ways extremely inaccurate.
翻译：因此，虽然在很多方面，我们对社会体制的认识极度不准确，但是这些认识并不能够被新的发现所正式推翻。