Imagine you could wave a magic wand and boost the yield of the world's crops, cut their cost, use fewer-fossil fuels to grow them and reduce the pollution that results from farming.

想像一下你可以挥舞魔杖来提高世界农作物的产量，降低成本，使用更少的矿物燃料来种植庄稼并且减少由此带来的污染。

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He added that many people were shot in the head, with seven people within 10 yards (meters) of him cut down in the first wave.

他指出很多人被爆头射杀，而他周围10米就有7人在第一波射击中倒地身亡。

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This arrangement lasted until the 1930s, when the invention of short-wave wireless improved and cut communications costs.

这种安排一直持续到1930年，当时的无线短波改善和降低了通讯费用。

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This is combined with a mass wave of cut-backs in the public sector.

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And to suggest to Americans that there is some other way, that you can wave a magic wand and cut oil prices and cut gas prices, is simply not treating the American people with the kind of respect they deserve -- because they know better.

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This new feature was meant to cut down on a wave of aggressive friend requesting that had swept Facebook lately.

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