Language Point 38

This principle works elsewhere as well. (Para. 16)

Meaning: This principle is effective in other situations, too.

principle: n. a basic truth, law, or theory

In human friendship an important principle is "forgive and forget".
在人与人的关系中，重要的原则是"宽容与遗忘"。

One of the principles of modern economics is the principle of competition for values.
现代经济学的原则之一是价值竞争原则。

"Work" in this sentence means being successful or effective.

Your idea won't work in practice.
你的想法在实践中行不通。

It is no good trying that method, because it won't work.
尝试那种方法没有意义，因为它不起作用。