This may sound like a freesolution to global warming—but not if you have to breathe China's air.
这似乎是解决全球变暖的一种免费方案——但其实并非如此，除非你必须呼吸中国的空气。
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This may sound like a freesolution to global warming-but not if you have to breathe China's air.
如果你不用呼吸中国的空气，上述方法听起来好像是解决全球变暖的一个不用花钱的良策。
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The HP Smart Web printing program is a useful freesolution that organizes online research right in your browser. Its ability to modify and preview documents before printing is also a help.