Box Rush is our latest tricky game that is easy to adapt but hard to master.

这个游戏很容易入门，但是很难掌握，变成高手。

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Select from different landscapes and pilots. You will find Motorbike easy to play but hard to master.

选择从不同的景观和飞行员。你会发现摩托车容易发挥，但很难掌握。

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This experience is hard to describe, but once you master it you’ll have discovered a powerful technique for releasing stress and improving your focus in a very short period of time!

这种感觉很难描述，但一旦你掌握了它，你就会发现一种强大的解压工具，而且在很短的时间内就可以改善你的注意力。

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It's always hard to say how much this kind of personal branding contributes to the success of a business, especially one like fish-farming that's easy to enter but hard to master.

FORBES: Magazine Article

But the split would leave Netflix with one business that is probably going to shrink DVD-by-Mail and another that ought to be growing fast but is going to be hard for Netflix to master.

FORBES: Netflix's Split Won't Cure Its Online Streaming Ills