Moreover, the explanatory prose is haphazard (and not infrequently wrong or incoherent — for example, I cannot make heads or tails of the lead-in to the very first example, prime.py).

此外，解释性叙述是随意的(并且经常出错或语无伦次—例如，我找不到第一个示例—prime . py—的介绍的开头或结尾)。

youdao

For example, you may check emails, browse web sites, run errands, and go out for a run whenever it is convenient, resulting in a rather haphazard sequence of events.

比如，你可能会查看邮件，浏览网页，跑跑腿，之后无论是不是方便出去执行，这样当然就会导致事件顺序的随意性。

youdao