当然要说明的是，电量消耗记录要涉及到很多变量（手机硬件，ROM，内核等等），而且也不会有2个机器耗电完全一样，但我描述的电量使用趋势是现代手机所共有的。

While many variables are involved (phone hardware, ROM, kernel, etc) and no two devices will perform exactly the same, the trends that I will describe are becoming more common in new phones.

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限制你的信息流，让他们发给你更长期的趋势，而不是没用的变量。

Limit information streams so they send you broader pictures rather than useless variations.

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长期趋势是指变量的值在一个长时期内所呈现的增加或减少的趋势。

Secular trend is the value of the variable tends to increase or decrease over a long period of time.

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