英语语法分析

This precept has guided U.S. government policy for 30 years.

这一概念已经指导了美国政策30年。

I've found this precept to be extremely useful with my happiness project.

我发现这个规则对我的快乐计划特别有用。

He commissioned me to write a poem on some high moral precept which I do not remember.

他便委托我写一首忘了是哪种道德教诲诗。