Wolverton said he spent $500 on access codes for digital books and programs this semester.

沃尔弗顿说，这学期他花了500美元购买电子书和程序的访问码。

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While more research is needed, Wolverton says the study has shown that common indoor landscaping plants can remove certain pollutants from the indoor environment.

虽然还需要进一步的研究，但是沃尔弗顿说：这项研究已经表明，普通室内观赏植物能够清除室内环境中的某些污染物。

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How it Helps: Its dense foliage excels at absorbing formaldehyde—the most prevalent indoor pollutant, says Wolverton—which shows up in wood floorboard resins and synthetic carpet dyes.

它的作用：这种植物茂密的叶片擅长于吸收甲醛，甲醛是一种最常见的室内空气污染物，木地板树脂及人造地毯染料均会释放甲醛。

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"One person shouldn't have complete control of the money, " says Mr. Wolverton.

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She phoned her home in Wolverton from the phone box at 02:43 and spoke to her flatmate to say she was upset.

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Miss Manning had walked off alone to get a taxi but phoned her home in Wolverton from a call box at 02:43 and spoke to her flatmate to say she was upset.

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