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For Harris, the retail specialist in Nashville, her rationale was two-fold.

Europe's aim in taking this defence action is two-fold as well:

Last October, the head of the US Africa Command, Michael Langley, said he thought IS had grown in northern Somalia by about "two-fold" in a year.

She says the impact was "two-fold" – it not only legitimised women’s sport, it also inspired the next generation.

“The problem is two-fold: First, that the warming promotes growth, and second that more exposed surfaces are appearing as snow and ice melts,” Siegert said.