那些合同是用复杂难懂的语言写的。

The contracts are written in obscure language.

《柯林斯英汉双解大词典》

一些本该简单透明的东西，却在有意或无意间变得复杂难懂，从而损害了消费者的选择权。

Something that should be simple and transparent can be complicated, intentionally or unintentionally, in ways that impair consumer choice.

youdao

想象一下，从阅读短至一两句话的文本，到努力去读整本用复杂的语言编写、观点晦涩难懂的书籍。

Imagine going from reading texts as short as one or two sentences to trying to read entire books written in complex language and containing sophisticated ideas.

youdao

It's the vocabulary, it's the complexity of the thought, and so on that makes it difficult. Iser acknowledges this.

是词汇，思想的复杂性等等,使它变得难懂，伊瑟尔承认这一点。

耶鲁公开课 - 文学理论导论课程节选

As you have no doubt experienced, this is a dense and difficult poem, so please reread it innumerable times for Wednesday's class, and in addition to that do the other readings assigned.

你们肯定也觉得了，这首诗很复杂很难懂，所以要一遍一遍的重复读，准备好周三的课，也要读布置的其他材料。

耶鲁公开课 - 弥尔顿课程节选

So, this is a more complex and, sort of, dense example of how that consumer, that push to consume, that consumer sense drives and motivates the novel and plays out in what they see when they are on the road.

这是个更复杂更难懂的例子，它有关那些消费者，怎样推动消费和消费者的意识怎样驱动小说情节发展,及演变出他们在路上看到的各种事物。

耶鲁公开课 - 1945年后的美国小说课程节选