If the current is sent in the opposite direction, the polarization is reversed.

如果当前发送一个相反的方向，磁极指向就反转。

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Unless current trends are reversed, the western hemisphere's ongoing struggle to establish strong, viable democracies could well lose one of its greatest current success stories, Colombia and possibly Peru.

CENTERFORSECURITYPOLICY: America's blunder, Chavez's success

Unless current trends are quickly reversed, our nation faces a growing ethnic and racial disconnect between those who seek care and those who provide that excellent care.

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In the current unprecedented crisis that process has been reversed - this time with many highly educated youngsters leaving, adds our correspondent.

BBC: Portuguese flee economic crisis