3. At the very least, the court should make itself subject to the code of conduct that applies to the rest of the federal judiciary.

【分析】复合句。At the very least在句首作状语，that 引导定语从句修饰 the code of conduct。

【译文】至少，法院应当服从适用于联邦司法系统其余部门的行为准则。

4. They gave justices permanent positions so they would be free to upset those in power and have no need to cultivate political support.

【分析】复合句。主句为 They gave justices permanent positions, so 引导目的状语从句，从句主干为 they would be free...and have no need...。

【译文】他们给予法官们终身任期，以便法官们能自由地推翻当权者，且无需拉拢政治支持。