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世界可能是殘酷的，但它也是美麗的。

The discovery of odorant receptors and the organization of the olfactory system has opened up new avenues for research in neuroscience and biology.

The food issue is not only an economic issue, but also a political one, related to the long-term stability of the country.

每一天都是改變生活的新機(jī)會。