The user has no way to tell if the problem is authentication, a missing script (which is the case here), user error, or even whether something in the code caused the problem.

用户无法判断问题究竟是认证问题、没找到脚本（此处就是这种情况）、用户错误还是代码中有些地方产生了问题。

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All the new rules do is exempt the user from legal liability - something Apple does not appear to be pursuing anyway.

新法规做到的仅仅是免除了用户的法律责任-看起来苹果本来也不打算追究这种责任。

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The authenticity of other user opinions is something that is difficult to replicate by your business.

其他用户的真实性观点是很难通过你的商业进行复制的。

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Anything that tells him to sense something like the user's mouse or the edge of his screen is actually purple in color; and so they're nicely colorized and all this but the one that's adventurous right now is this.

能够让计算机感知鼠标或屏幕边缘的图块,都是紫色的;,这些图块五颜六色,但这里有一个不太靠谱的按键。

哈佛公开课 - 计算机科学课程节选

So, summarizing better, assert is something you put in to say to the user, make sure you're giving me input of this type, but I'm going to guarantee you the rest of the code works correctly. Exceptions and exception handlers are saying, here are the odd cases that I might see and here's what I'd like to do in those cases in order to try and be able to deal with them.

所以更好的总结下,断言就是你放在那里告诉用户,保证你输入的是这种类型的,但我能保证剩下的代码运行正确,异常和异常处理做的事,这里有些我能预期的异常情况,并且这里有些情况,我能尝试处理。

麻省理工公开课 - 计算机科学及编程导论课程节选

Even those of you who've taken AP computer science or something similar perhaps recall that even just getting a piece of input from the user is ridiculously not obvious.

你们中上了AP计算机科学这门课,或者类似的课程的人可能还记得,即使只是从用户那里得到一个输入,也相当麻烦。

哈佛公开课 - 计算机科学课程节选

The mechanism described is not something the average user could, or reasonably would, leverage, as it requires local access to a system, local administration rights and a debugger in order to work.

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It utilizes a phone's digital compass, and read out the direction the user is facing, something that is apparently very important when navigating through public transport, while the audio component opens up Google Map features in a non-visual way.

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Most of this revenue is generated by in-game spending on virtual goods, an area which is just beginning to take off in the U.S. Online gaming is all about owning the user experience, and traditional display advertising is viewed as something which takes away from the game experience.

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