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问:黑巧克力被认为对心脏有好处。但我怎样知道哪种巧克力才是“黑”的?是从它的颜色辨认出来吗?有些巧克力的标签列明其中黑巧克力占的比例,另外一些产品则列明可可粉的比例。可不可以帮我选个最好的?读者何女士
Q: Dark chocolate is considered good for the heart. But how do I know which kind of chocolate is “black”? Is it recognized by its color? Some chocolate labels indicate the proportion of dark chocolate, others show the proportion of cocoa powder. Can you help me choose the best? Reader Ms. Ho