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。

《柯林斯英汉双解大词典》

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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Much of the problem is that older circuit-switched networks were designed for one purpose: to connect two callers by opening up a dedicated line between them.

FORBES: Grand illusions

Monye started the last two games at full-back, having been switched from his regular position on the wing, but was moved out of the firing line against Argentina after a nightmare first half.

BBC: England call-up for Erinle & Shaw

So Oates temporarily relented and switched Ovechkin back to the left side for a handful of games, putting the two-time league MVP on a line with little-used players, as if to send the message: Are you sure this is what you want?

WSJ: Alex Ovechkin heads in right direction for Caps