On top of these basic building blocks, programmers have built all sorts of clever variants, with slightly different properties -- data structures like red-black trees and heaps, which we don't have time to cover.

在这些基本构建块之上，程序员构建了各种巧妙的变体，它们的属性略有不同——像红黑树和堆这样的数据结构，我们没有时间介绍它们。