难懂的英文：
ult to understand; unintelligible; complicated
- Einstein's theory of relativity is very abstruse.
爱因斯坦的相对论非常难懂。 - Her allusive style is difficult to follow.
她引经据典的风格晦涩难懂. - A sentence that does not cohere is hard to understand.
前后不连贯的句子很难懂。 - Illuminate a difficult passage in a book
解释书中难懂的段落. - It is a dense novel.
这是一本晦涩难懂的小说。 - Arabic script is hard to understand and learn.
阿拉伯文字既难懂又难学。 - His difficult style obscures his meaning.
他深奥的文体使他的意思晦涩难懂。 - Not clearly defined; not explicit.
难懂的，不明白的没清楚定义的，不明白物 - The debt-ceiling agreement is complicated and opaque.
提高债务上限的协议十分复杂，晦涩难懂。 - Footnotes illuminate the difficult passage of the book.
脚注中阐明了书中许多难懂的道理。
adj. 困难的；执拗的；不易相处的
- The exercise is that difficult!
练习题那么难！ - You must admit the task to be difficult [ that the task is difficult ].
你应当承认这项任务是艰巨的。 - You must admit the task to be difficult [that the task is difficult].
你必须承认这项任务是困难的。
v. 懂，理解；了解，认识到；体谅
- If you were older you might understand.
假如你年龄再大一点，你就会理解了。 - I understand that skepticism.
我明白这一怀疑论。 - You have to understand how cells interact.
你必须明白细胞是怎样相互作用的。
a. 无法了解的,难解的,莫明其妙的
- She croaked something unintelligible.
她声音沙哑地说了些含糊不清的话。 - To talk rapidly,unintelligibly,or idly.
急促、含混不清或无意义地讲话 - He answered in words unintelligible to her.
他用她听不懂的话来回答