过氧化二异丁基

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This is Scientific Americans 60 Second Science, I am Cynthia Graber, this will just take a minute. Compounds found in the herb thyme have antibiotic properties. Now scientists have demonstrated that thyme might have a future role in fighting acne. A

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学英语单词

arteria thyreoidea superior

axial power flattening

barbed wire machine

barocci

Baron Hermann Ludwig Ferdinand von Helmholtz

barrier-layer cell, barrier-layer photocell