At last, using the hydroxyl radical system, superoxide radical system, the antioxidation activities of crocetin and crocetin dimethyl ester were studied and compared with BHT.

采用羟基自由基体系和超氧阴离子自由基体系对藏红花酸及藏红花酸二甲酯的体外抗氧化活性进行研究，并与BHT进行比较。

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The school system needs radical restructuring.

ECONOMIST: Education policy

Clearly, a two-rate system of 10% and 25% would be a radical departure from the seven-tier system we find ourselves stuck in today, and a major step towards a system where every American can quickly estimate their federal tax liability.

FORBES: Tax Aspects Of Paul Ryan's FY 2014 Republican Budget Proposal

Both advocated radical changes to the educational system, which brought clashes with the local teachers union.

FORBES: Andreessen Horowitz Names Adrian Fenty As Special Advisor