如何在 Markdown 中引用诗词或歌词 | /cn/2018/07/quote-poem/

访客 *Dong* @ 2018-07-10 15:59:29 写道：

高中生物课本里有说到蝉一般在24度以上且光照达到一定强度才鸣叫。夏天月圆之夜应该有机会听到蝉鸣。王安石诗里听到蝉鸣的应该可能行比较小，可能是其它虫子的叫声。

A few people have asked me if cicadas sing at night. The truth is, in most cases, they do not. Most of the time when you hear an insect at night it is a cricket or katydid. However, there are a few cases when cicadas will sing at night:
In the presence of artificial light sources, like streetlights & floodlights, or a full moon. I turned on a flood light tonight to test this and it worked: a cicada started to sing. --- http://www.cicadamania.com/cicadas/do-cicadas-sing-at-night/

访客 *大鹏* @ 2018-07-10 16:04:28 写道：

宰了我吧……《学 R》一书每章的开头，我就是给引用文字用了代码格式，因为好看……

@pzhaonet

访客 *Chun-Hui Gao* @ 2018-10-16 09:22:49 写道：

为什么Markdown换行一定要输入两个空格？明明敲一下回车已经换行了，输出的结果还是在一起。为什么要这么设计？不解。