The helper provides options for arbitrary HTML to be included at the top and bottom of the list — you saw them in the earlier snippet from the layout body (Listing 2) as :top and :bottom.

helper 函数允许列表的顶部和底部包含任意的 HTML —— 它们在前面的布局正文片段（清单 2）中是 :top 和 :bottom。 生成的 HTML 类似于清单 7。

youdao

So any epitaph is therefore a self-declared cenotaph an inscription on a place where the body isn't which of course tells us a lot too about the arbitrary nature of language.

所以，墓志铭其实就是一个自称的衣冠冢，一个铭文在遗体却不在的地方，当然通过此也充分说明了，语言的随意性特点。

youdao

Anatomy involves learning arbitrary Latin names for hundreds of different elements of your body. There often aren’t clear patterns and constructs, just a dry list of facts.

其中一个例子就是我在医学院一年级时学习解剖学，解剖学中涉及到数百个与器官相关的拉丁名词，这些名词并没有明确的派生关系和构词方法，而仅仅是一系列的毫不相干的词。

youdao