Understanding controllers boils down to the three rs: return, redirect, and render.

对控制器的理解可以归结为三个r： return、redirect和render。

youdao

Follow the three rs: respect for self, respect for others and responsibility for all your actions.

遵行三个原则：尊敬自己、尊敬别人、为自己的行为负责。

youdao

Follow the three rs: Respect for self, Respect for others, and Responsibility for all your actions.

遵循三个“R”：尊重自己，尊重他人，对自己所有的行为负责。

youdao

The children also get a lesson in two of the three Rs (reduce, reuse, recycle).

CNN: Envisioning a world without garbage

The government now wants a return to greater emphasis on the three Rs.

ECONOMIST: South Africa's education system

The chief inspector also commented on standards in schools in general, saying "too many" were inadequate, leaving children with a poor grasp of the three Rs.

BBC: RELATED BBC SITES