Excessive or gratuitous animation can obstruct the flow of your application, decrease its performance, and annoy users.

但是过多无意义的动画会阻碍应用程序的流程，影响其性能并使用户不胜其扰。

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Facebook ads, on the other hand, annoy users.

FORBES: Why I Lost My Faith In Facebook Advertising

It's a proprietary standard, which will annoy some users, but Microsoft defends it thusly: the Surface is said to recharge in a little over two hours.

ENGADGET: Microsoft Surface: inside the three-year secret project to build the first great Windows tablet