What are they made of? They smell fragrant.
书签是用什么做的？闻起来香香的。
And next time you stop to smell the roses, they could be less fragrant.
可能在你下一次嗅玫瑰的时候，它就不那么香了。
And next time you stop to smell the roses, they could be less fragrant. A group of scientists now say pollution is tainting the molecular build-up that causes a flower to smell so sweet.
下次你驻足闻玫瑰花味时，它可能没那么香了，科学家们说是因为污染破坏了使花朵闻起来香甜的分子结构。
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