After the serious technical topic, we came into a trainee art PK stage.

The other trainees fancy boarding schools and European exchange programs.

其他实习生都是高档寄宿学校的寄宿生或者欧洲的交换生.

He's a management trainee.

是一位企管实习生.

...moral principles...

道德准则

Stick to your principles and tell him you won't do it.

要恪守自己的原则，告诉他你绝不会干的。

There are three fundamental principles of teamwork.

团队合作有三个基本原则。

I refuse to lie about it; it's against my principles .

我绝不为此事撒谎；那是违背我的原则的。

Discussing all these details will get us nowhere; we must get back to first principles (= the most basic rules) .

一直谈这些细节不会有结果的；我们必须回到根本原则上来。

the principle that heat rises

热气上升的定律

...the principles of quantum theory.

量子论原理

...a violation of the basic principles of Marxism...

违背马克思主义的基本原则

These people lack all understanding of scientific principles.

这些人对科学原理一窍不通。

In principle there is nothing that a human can do that a machine might not be able to do one day.

原则上，总会有一天，凡是人能做的事，机器就能做。

The principle behind it is very simple.

其中的原理十分简单。

the principle that free education should be available for all children

所有儿童都应该能享受免费教育的观念

He doesn't invest in the arms industry on principle .

他根据自己的信条，不投资军火工业。

They have agreed to the proposal in principle but we still have to negotiate the terms.

他们已基本同意了这项提议，但我们还得磋商各项条款。

the principles and practice of writing reports

报告写作的理论与实践

Buck never allowed himself to be bullied into doing anything that went against his principles...

巴克从来不会因为受到威胁而做违背自己原则的事情。

The doctrine was based on three fundamental principles.

这个学说建立在三条基本原理之上。

She refuses to allow her family to help her as a matter of principle .

她不要家人帮忙，对她来说这是个原则问题。