We call this variation the density differential.

我们称这种变数为密度微分。

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To rule out the variation in brain activity that would be expected when someone listens to a call normally, changes in activity were monitored while the phone was taking a call but was muted.

为了排除人们正常接听电话时带来的脑活动力的变化，手机通话时消除了声音，同时监测脑活动力的变化。

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Next, there is variation in what to call things.

其次是在叫什么东西的变化。

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You could call it a variation on the old hard-cop, soft-cop routine.

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The result is variation in the number of copies of that sequence, a variability we call CNV.

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Some may call it heresy, but any methodology subject to so much variation, imprecision and even manipulation should not form the basis for equity valuations.

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