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。
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。
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。
So if the bees weren't here to do that, our crops would also be reducing and not only that, it affects another creature.
所以一旦蜜蜂不再授粉，我们的作物可能会减产而且不止这样，它还会影响许多其他生物。
Now that these bees are reducing in number, does that affect us? Of course it does because honey bees help pollinate a variety of farm crops, vegetables, fruits and many other plants.
因为蜜蜂帮助不同的农作物、蔬菜、水果以及许多其他植物授粉。
The Roundup Ready system has helped farmers grow more corn, soybeans, cotton and other crops while reducing detrimental soil tillage practices, killing weeds easily and cheaply.
抗农达除草剂的种植体系帮助农民种植更多的玉米、大豆、棉花和其它作物，该方法可以减少耕作，并廉价和快速的清除杂草。
Because the pests prefer the taste of the trap crops, only these plants need to be sprayed, reducing the amount of pesticide use.
因为昆虫喜欢诱捕作物的味道，只有这些作物需要喷药，减少了杀虫剂使用量。
Farmers have learned many ways in reducing the damage done to crops.
农民学会了许多降低损害的方法。
Withtheir enormous size and weight, today's farm machines have significantdownside: they compact the soil, reducing porosity and killing beneficial life, meaning crops don't grow so well.
就其超大规模和重量而言，如今的农业器械有巨大的不利之处：它们会压紧泥土，从而减少了泥土间的空隙孔且杀死了有利的生物，这意味着作物不会很好的生长。
With their enormous size and weight, today's farm machines have significant downside: they compact the soil, reducing porosity and killing beneficial life, meaning crops don't grow so well.
译文：就其超大规模和重量而言，如今的农业器械有巨大的不利之处：它们会压紧泥土，从而减少了泥土间的空隙孔且杀死了有利的生物，这意味着作物不会很好的生长。
With their enormous size and weight, today's farm machines have significant downside: they compact the soil, reducing porosity and killing beneficial life, meaning crops don't grow so well.
译文：就其超大规模和重量而言，如今的农业器械有巨大的不利之处：它们会压紧泥土，从而减少了泥土间的空隙孔且杀死了有利的生物，这意味着作物不会很好的生长。
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