The investigation has suddenly switched to a new line of inquiry.

调查突然改用一种新的探询方法。

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Some passengers unable to fly on domestic routes switched to rail, with train companies putting on more services on the East Coast and West Coast main line routes.

一些无法乘坐国内航线的乘客转而选择火车，而火车公司也在从东海岸到西海岸的路线上增加了更多的车次。

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The preventer on the runaway well failed. Even before the disaster, the operators of many gulf rigs had switched to more advanced preventers, strengthening this last line of defense.

在石油管路破裂时切断管路，甚至在事故发生前操作者可以采用多个隔离部件来切断产生更多阻力，加强最后一道防线。

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And that came after the cruise line switched the ship's towing destination from Progreso, Mexico, to Mobile.

NPR: Carnival Cancels 12 More Cruises On Troubled Ship

Yet when he came back to Villa two years' later and then, 12 months down the line, switched to his former club's city rivals, his form was good enough to keep him among the top five keepers in the Premiership.

BBC: Seaman's final hurrah

While that might seem odd, a number of longtime Democrats have sought waivers or switched parties over the years to try to get the Republican ballot line in the mayor's race, rather than join a Democratic field that's usually more crowded with experienced politicians.

WSJ: Corruption case reverberates from NYC to Albany