So, it's difficult to explain. Why is it difficult to explain?

这个很难解释。 为什么这么说呢？

Complex apps. Difficult to create, difficult to design, difficult to use.

复杂的应用程序。难以创建，难以设计，难以使用。

Must be enormously difficult to accommodate that inclination.

要满足这种喜好恐怕是相当困难.

Yeah, the hustle and bustle is really difficult to handle.

是啊，天天忙忙碌碌，挺难适应的。

And experimental protocols are difficult to discover and all too often, difficult to reproduce.

而且实验方法难以发现，往往更是难以复制。

They're elusive, very difficult to catch up with.

“它们非常神秘，很难捉到。”

He called solutions to the problem " increasingly difficult to even imagine."

他称解决这一问题的办法“越来越难以想象”。

Tough plastics — ones that are difficult to break down — difficult to destroy.

顽固的塑料——难以分解的塑料——难以破坏。

It is much more difficult to judge oneself than to judge others.

审判自己比审判别人要难得多啊！

Harry found it difficult to gather his thoughts.

哈利发现他很难集中思想。

Driving conditions range from difficult to impossible.

驾驶条件范围从很难变成了不可见。

– difficult to find and difficult to grow.

—很难找到也很难种植。

It's very difficult to find the frogs.

找到这种青蛙太难了。

However, exactly where this relationship ties is difficult to pin down.

然而，很难弄清楚这其中的联系到底如何。

It was not difficult to find. One floor down, pandemonium reigned.

一看就明白了。楼下一片混乱。

Are they always that difficult to make?

领结这样难看吗？

But these can be difficult to design.

然而这类机器人设计却并不容易实现。

Very difficult to know each other? Why?

很难相互了解？为什么？

The information may be difficult to obtain.

这个信息可能很难获得。

In some ways, difficult to keep up.

从某种程度上来说，我很难跟上。