Sometimes, sciencecan seem overwhelming. There are complicated concepts, unimaginably large - or small - objects, and vast distances that most people have a hard time understanding.

VOA: standard.2010.05.04

So it's often, I think people have a hard time delivering bad news,

有些时候，人们会觉得告诉客户坏消息是很难的事情，

正直是最好的 - SpeakingMax英语口语达人

It would have had a hard time getting through the shields and it didn't have any distance.

几乎没法穿过盾牌,也没有远程杀伤力

耶鲁公开课 - 古希腊历史简介课程节选

We are basically committed to each other for sex but it's very hard to make those relationships last a long time because we might not have anything in common, we might not share anything with each other, we might not trust each other, we are not particularly bonded to each other.

我们基本上只有激情的承诺,长时间维持这种关系很困难,因为可能双方没有任何共同点，没有共享的东西，我们可能互不信任，不是特别亲近。

耶鲁公开课 - 心理学导论课程节选