Amazon Kindle email conversion service: free online eBook conversion service.

亚马逊Kindle邮件转换服务：免费的在线转换服务。

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But such places often come with lots of dust. And the panels have to stay dust-free: just a seventh of an ounce of dust per square yard of panel can decrease solar power conversion by 40 percent.

但此类地点通常有着大量的灰尘，而电池板必须远离灰尘：电池板上每个正方形区块只要有七分之一盎司的灰尘，就能减少40%的太阳能转化率。

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And the panels have to stay dust-free: just a seventh of an ounce of dust per square yard of panel can decrease solar power conversion by 40 percent.

偏偏太阳能板需要一个无尘的环境：每平方码只要有七分之一盎司的尘土就会降低太阳能板40%的转换效率。

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Just as America's adoption of catalytic converters led eventually to the world's conversion to lead-free petrol, so its drive to clean-energy technologies will ensure that these too spread.

ECONOMIST: Climate change

While I understand that technology must move forward, manufacturers should offer pain-free conversion paths.

ENGADGET: This is the Modem World: Please fix two things

At the time, SOFTBANK was only partway through a cloud conversion, but it turned on free cloud service for non-profits, government agencies and existing customers in just three days.

FORBES: Innovative Companies Are Only As Good As Their Bravest Customers