That's the basic principle of portfolio diversification.

这就是投资分散化的基本原则。

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We don't have time to review that, but let's go on to say the following, that what Musorgsky knew there was a very basic principle of acoustics, and what is that principle?

我们没时间回顾,我们继续讲接下来的内容,穆索尔斯基知道,一个基本的声学原理,是什么原理呢

耶鲁公开课 - 聆听音乐课程节选

That's the first very basic principle.

这就是第一条最基本的原则。

耶鲁公开课 - 金融市场课程节选