In traditional electric fence systems, the high voltage wires are interleaved with earth wires up to the height of the fence line, which means that every second wire provides no deterrent.

传统电围栏系统中高压电线被交叉的地球电线达在这意味着每个第二线提供不阻的篱笆行的高度。

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In the Jerusalem speech, Romney defended a hard-line stance on Iran as a deterrent to war, rather than a desire to start one.

CNN: Romney talks tough but differs little from Obama on Iran

Some companies that have chosen to draw lines in the sand have reported extremely positive bottom-line impact as well as a long-term deterrent to frivolous lawsuits.

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However, he says the best deterrent is still a simple one: "The best line of defense to defend your house is having an alarm sign in front, " he says.

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