A trio of researchers compared donors with a gaggle of crop - growers, spraying water hither and thither, leaving some plants parched, others deluged.

三名研究人员将捐助国比作一群作物栽培者，洒水时这边洒一点、那边洒一点，一些植物因没浇到而干燥不堪，而其它的则因过量而积水成涝。

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Glyphosate is a nonselective herbicide, it can eradicate many weeds and safety for cane crop by using protective shield during spraying.

草甘膦是灭生性除草剂。使用时采用防护措施定向喷施，就能达到有选择地灭除杂草而对作物安全的目的。

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A trio of researchers compared donors with a gaggle of crop-growers, spraying water hither and thither, leaving some plants parched, others deluged.

三名研究人员将捐助国比作一群作物栽培者，洒水时这边洒一点、边洒一点，一些植物因没浇到而干燥不堪，而其它的则因过量而积水成涝。

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Colombia has done especially well: partly because it switched from ineffective crop-spraying to large-scale manual eradication, its coca-growing land has been reduced by 60% in the last decade.

ECONOMIST: Successes in the war on drugs expose the policy��s limits