Despite being frost-tolerant, they usually flower before the risk of a late frost is over and the flowers can die, reducing crops.

尽管他们属于耐寒植物，但他们通常在危险的晚霜结束前开花，结果霜冻会使花死掉，导致减产。

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With their enormous size and weight, today's farm machines have significant downsides: they compact the soil, reducing porosity and killing beneficial life, meaning crops don't grow so well.

由于庞大的体积和重量，现在的农业机械有显著的缺点：它们会把土壤压实，降低土壤孔隙度，杀死有益的生命，这意味着农作物不会长得太好。

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It can lead to crops that resist pests and diseases, reducing the use of toxic chemicals harmful to the environment and human health.

生物技术产生的作物可以抗病虫害，减少有害环境和人类健康的有毒化学品的使用量。

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Hassan Moinuddin of the Asian Development Bank's Mekong Sub-Region Program says a warmer climate could cut almost seven percent off the region's gross domestic product by the end of this century, by reducing crops or forcing the relocation of communities.

VOA: standard.2009.12.21

Broadbent is a weather freak who points out that both the 1945 and 1961 Bordeaux vintage were subjected to frosts and heavy rains, respectively, thereby reducing crops to small, thick skinned grapes producing deeply colored, concentrated and tannic vintages.

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The adoption of herbicide-resistant crops could help improve water and soil quality by reducing the need for tilling.

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Benbrook also fails to mention that by improving weed control and reducing the need for ploughing, genetically engineered herbicide-tolerant crops enable many farmers in North and South America to adopt and maintain no- or reduced-tillage production systems, which results in important reductions in greenhouse gas emissions.

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