相对于正常的脑部活动，受试者显示，他们系有通话状态的手机一侧的脑部多消耗了7%左右的糖类。

Accounting for normal activity, the subjects showed about a 7 percent boost in sugar use on the side of the head where the active cellphone was.

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一旦经泌尿系感染上行至肾脏将会造成永久性的损害肾脏感染常见的症状有发热、恶心、呕吐、一侧的腰背痛。

But when it spreads to the kidneys it can cause permanent damage. Signs of a kidney infection include fever nausea vomiting and pain in one side of the lower back.

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在极坐标系里，要记住在积分一侧,只是把x变成rcosθ，y变成rsinθ

So, when you go to polar coordinates, basically all you have to remember on the side of integrate is that x becomes r cosine theta. y becomes r sine theta.

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