我们也可以选择无线微波回程，但这必须保持发射塔在同一条视线上，而且在一些情况下数据必须通过有线网络传输。

There is also the option of a wireless microwave backhaul, but it requires cell towers that are in the same line of sight, and at some point the data still has to go wired.

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也有一些证据表明，咖啡有助于控制哮喘病甚至减少发病率，而且，在没有药物的情况下，可以止头疼、提神和预防蛀牙。

There's also some evidence that coffee may help manage asthma and even control attacks when medication is unavailable, stop a headache, boost mood, and even prevent cavities.

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可能在某些情况中两者是相同的，但是在一般情况下，一门语言可以在多个国家通用而且一些国家拥有不止一种的口语。

In some cases these are the same, but in general, a language is spoken in more than one country and some countries have more than one language that is spoken.

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And, in some instances, they can be made to behave more nearly metallic.

而且，在一些情况下，它们能表现出更接近金属的性质。

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