惩罚那些开车时使用手持设备的人已经够难的了，即使从车外都能看到他们。

Punishing people for using hand-held gadgets while driving is difficult enough, even though they can be seen from outside the car.

youdao

这项因素虽然难量化，可以被衡量使用不同的度量。

This factor, although difficult to quantify, can be gauged using various metrics.

youdao

对于程序员，这些约束意味着庞大(在内存占用和接口大小方面)的和难掌握的API，学习和使用都很难。

To the programmer, these constraints mean a heavy (both in terms of memory use and interface size) and unwieldy API that can be hard to learn and frustrating to use.

youdao

If unfamiliar, these are the mechanical computer devices that you have to use to buy a ticket on the T these days and there was one of these really awkward but touching situations where it was clear that this woman had no idea, you know, what to do, how to get from here to here, and I could see her just staring at the turnstiles that you're supposed to go through to get into the subway.

如果不熟悉，这是机械计算机设备,当今你必须使用它们来买地铁票,它们实在是难操作的,这个令人同情的情况是,明显这位老太太不知道怎样操作，怎样从这一步到那一步,我看见她只是凝视着,地铁的栅门口。

哈佛公开课 - 计算机科学课程节选