prin主要的 + cip拿取 -> 遵循最主要的事物 -> principle原理

principle:

n. 原理，原则；主义，道义；本质，本义；根源，源泉

We are still studying the working principle of this machine.

It's not just a matter of principle.

这不仅仅是个原则问题。

He would vote against it on principle.

他会依据原则投票反对它。

The principle behind it is very simple.

其中的原理十分简单。

She resigned over a matter of principle.

她因为原则问题而辞职。

He acted out of expediency, not principle.

他的行为是出于权宜之计而非原则。