The chapter headings are useful signposts to the content of the book.

章节标题有助于了解书的内容。

The scheme comprises a main viewing space, a bird blind and two entry signposts.

该方案包括一个主要的观赏空间，一个隐蔽观鸟点和两个入口标牌。

"One of the most important signposts is downside selling pressure drying up," he says.

Stack表示：“一个最重要的信号是下行的卖出压力已经渐渐枯竭。”

But for all the potential tales of woe that they suggest, scars are also signposts of optimism.

这些疤痕既显示了潜在的灾难故事，也是乐观的标志。

So we need a description at the beginning and a few signposts inside explaining the road taken.

总之，我们需要在开始时给出一个描述，然后再在整个代码内部的几个位置加以注释。