Once your programs get fairly complex, it becomes harder and harder to find things and to tweak things if you're not being organized.

一旦代码稍微复杂点,而你又不规范你的代码,那么你想找什么东西就很困难了。

哈佛公开课 - 计算机科学课程节选

To figure out even what this thing is, let alone how to use it properly. So, you know, I'm sympathetic.

就连认出这是什么东西（都很困难），更别说正确应用它了，所以我很同情这点。

经常犯的失误 - SpeakingMax英语口语达人

What's so hard about testing?

测试中有什么困难呢？

麻省理工公开课 - 计算机科学及编程导论课程节选

instead of pursuing the questions of how exactly that theory should go, notice that if we had that theory ... we could still evaluate in principle-- whatever the practical difficulties might be-- in principle we could still evaluate rival lives.

我们不去研究,那种理论如何发挥作用，即便我们有那种理论,原则上我们仍然可以-,不管实际困难是什么-,原则上我们仍然可以评价其他生活。

耶鲁公开课 - 死亡课程节选

There are really two purposes in us doing this: one was so you can get a fix on your own eating, and second you can see the challenges that are involved in assessing what people eat when you start doing studies linking diet to health.

这么做实际上有两个目的,一是你可以调整你自己的饮食,二是当你开始研究,饮食与健康的关系时,你会发现,在对人们吃什么进行评估时存在很多困难

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Have you run into any difficulty while learning a foreign language?

学外语的时候你遇到过什么困难吗？

阳光总在风雨后 - SpeakingMax英语口语达人

Have you met any difficulties in taking the tests?

你在考试中遇到过什么困难吗？

想学习宗教学 - SpeakingMax英语口语达人

Do you have any difficulties in teaching students?

在教学过程中，你遇到过什么困难吗？

布朗克斯的足球教练 - SpeakingMax英语口语达人