The Aufbau Principle comes from a German word which means it is essentially construction or building, build-up principle.

构造原理原来自一个德国词汇,意思是基本的构造,建筑，或修建原则。

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And he is a violist, not a violinist, but the principle here is pretty much the same, so tell us about the construction of the instrument.

他是位中提琴手,不是小提琴手,但提琴的原理都很相近,跟我们讲解下乐器的结构吧

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