What is the difference beween "smell" and "odor" and "scent"?

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Jun 23, 2013 09:16
What is the difference beween "smell" and "odor" and "scent"?
How should I use these properly?
"smell" と "odor" と "scent"の違いは何ですか?
どうやって使い分けたら良いですか?