Levine acknowledges that implementing an environment that encourages performative ties isn "t necessarily easy."

拉文承认，营建一个鼓励主动性联系的环境并不一定非常容易。

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It isn't the case that defending easy dominates defending hard.

防守平坦之途并非优于防守崎岖之途

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"It is a game that isn't easy to analyse, " said Nadal.

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The full scope of that gambling isn't easy to measure, but Kane says that thousands of gambling venues exist in the game and have moved the virtual equivalent of hundreds of thousands or even millions of dollars, almost entirely free of taxes.

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As a parent of three young children, I can imagine that this isn't easy to do.

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