Easy to miss if you're not looking for it: you can double-click on any DVD or CD.iso image and you'll see a helpful little applet that will enable you to burn the image to a blank disc.
如果你不去找就很容易错过它：你可以双击任何DVD或CD的。ISO镜像文件，你会看到一个粉有用的小程序让你把它烧进一张空白盘。
In his play Macbeth Shakespeare has his three witches hovering over their mystical brew chanting “double, double toil and trouble; fire burn and cauldron bubble.”
在莎翁的戏剧《麦克白》中，他写到有三个巫婆围着她们的魔药，并且吟唱着：“不惮辛劳不惮烦，釜中沸沫已成澜”。
If we continue to burn fossil fuels at current rates, levels of carbon dioxide in the atmosphere will reach 550 PPM (parts per million) — double pre-industrial levels — by around 2050.
如果我们继续按照目前的标准使用矿物燃料，到2050年全球大气中的二氧化碳含量将达到550ppm(百万分率)。这个数字是人类进入工业化社会前的两倍。
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