It can be put on a tree around your house to test the air quality.

你可以把它放在你房子周围的树上来测试空气质量。

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On our standard rundown test, where we'll loop a video until the machine calls it quits, the new Air clocked in at just over five and a half hours.

在我们用的标准消耗测试里（重复播放一段影片，直到笔电挂了为止），新的 Air 一口气跑足五个半小时。

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The experiment will not spray anything other than tapwater into the air, so it is not a test of geoengineering, since it will not have any effect on the climate or the weather.

这个试验只是将自来水而非其它物质喷向空中，不会对气候或天气产生任何影响，所以它不算是一项地球工程学的试验。

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That's awful compared with the 6 hours and 13 minutes I got on the 13-inch MacBook Air in the same test.

WSJ: Review of Dell XPS 12: Dell Laptop Does Flips to Try to Be a Thick Tablet

So after weeks of test runs and fine-tuning, Soundcheck christened the space on air when the up-and-coming Escher String Quartet stopped by to perform a couple of pieces.

NPR: Opening Day With The Escher String Quartet

The U.S. Air Force is currently test-flying an optionally piloted supersonic drone over the Gulf of Mexico based on a modified F-16 fighter jet.

FORBES: Pilot-Optional Flight Is Closer Than You Think