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change mind改变主意
例句：What made you change your mind?
什么使你改变了主意？
2.This hour, Secretary of State Hilary Clinton will be delivering what the administration calls a major address on the steps being taken to reduce nuclear weapons in the United States and abroad.
take steps采取措施
例句：They took steps to prevent the spread of influenza.
他们采取措施阻止流感的传播。