Unexpected issues are likely to appear that may require re-evaluation of the migration scope or the migration method.

意想不到的问题常常会出现，可能要求对移植范围或者移植方法进行重新评价。

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Applications that appear to display well with the larger resolution setting may require a lot of scrolling for a user who has set their computer to a smaller resolution.

在较大的分辨率设置中能正常显示的应用程序如果要在分辨率设置较小的屏幕中显示，用户将需要进行很多滚动。

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Some interaction designs require a sequence of steps (like a login procedure, for instance) to appear repeatedly in different contexts throughout the design.

一些用户交互功能的设计师常常需要在不同的过程中反复描述一系列相同的步骤(比如用户登录过程)。

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They even require him to appear in a few TV ads at no extra pay.

FORBES: Magazine Article

Democracy21 advocates forcing Super PACs to list their top five donors at the end of their ads, and also require that official Super PAC representatives appear in the ads.

FORBES: Campaign Finance Reform Does Not Equal Censorship

In contrast, startups appear out of thin air and require massive speed.

FORBES: How To Deal With Talent Problems In High-Growth Startups