为什么要表达元素之间的父子关系呢？

Why express parent-child relationships between elements?

youdao

通过部首或语义元素的组合，单个复合词可以表达复杂的概念关系，通常具有抽象的普遍性。

By the combination of radicals or semantic elements, single compound words can express complex conceptual relations, often of an abstract universal character.

youdao

注解是表达程序元素固有特性的最佳选择。

Annotations are best for expressing the inherent characteristics of a program element.

youdao

OK. And how do I create them? Well, the representation is, following a square bracket, followed by a sequence of elements, separated by commas, followed by a closed square bracket.

就是一个有序的序列，好，那么我们怎么创建元组呢？,好，表达式是，一个方括号，后面是一系列的元素，以逗号分开,以一个闭方括号结束，这就是我刚才所说的。

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