It's thought that sawfish populations have been reduced by some 90 percent due to habitat loss and accidental entanglements in fishing nets.

人们普遍认为它们之所以数量下降达90%是栖息地的减少和在捕鱼过程中的意外情况导致的。

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Spraying an iprodione fungicide on the nests after they’re taken out of the nesting boards “reduced chalkbrood levels by up to 50 percent—with no measurable loss of young,” she reports.

她报告说，把巢穴从巢套板上拆下来用杀菌剂异菌脲喷洒后“白垩病发病率就会减少50%——没有检测到幼虫死亡。”

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Losing 5 to 10 percent of your total weight may not seem like much, but even modest weight loss can improve your health by.

减少总体重的5% - 10%看起来不是很多，但是即使是减少一些体重，也可以通过以下方式来改善你的健康。

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Shares began to plunge immediately, eventually bottoming at a 52 percent loss by about a month.

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The Dow plunged 39 percent between October 23 and November 13, 1929, but it regained 74 percent of that loss by March 1930.

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In 2011, it focused on restructuring, which helped reduce its operating loss by 24 percent.

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