C) They cannot boost crop yields without causing greenhouse gas emissions.

C）它们无法在不造成温室气体排放的情况下提高作物产量。

African farmers tend to get much lower crop yields than farmers on other continents.

非洲农民的作物产量往往比其他大洲的农民低得多。

Biotechnology can raise crop yields and cure diseases- but it could equally lead to deadly weapons.

生物技术可以提高作物产量，治愈疾病，但同样可以制造致命武器。

These efforts are projected to increase crop yield by almost a quarter over the next few decades.

这些努力预计将使农作物产量在未来几十年提高近四分之一。

Scientists say they've boosted crop yields by 20 per cent by genetically enhancing plants' ability to photosynthesize.

科学家表示，他们通过基因增强植物的光合作用能力，将作物产量提高了 20%。

Grain acreage will be kept stable, per unit crop yield will be increased, and the quality of grains will be raised.

稳定粮食播种面积，提高单产和品质。

As a result, crop yields doubled for more than 33,000 farmers. The program also helped farmers to reduce post-harvest losses.

最后，3。3万多名农民的粮食产量翻了一番。该项目还帮助很多农民减少了收割期后的损失。

This new variety produces crop yields 20% higher than other rice plants and it immediately began to improve food availability in China.

这项新品种比其他品种的产量高出20%并且很快就改善了中国的粮食供应情况。

A big driver has been increases in crop yields.

一个重要的推动因素是农作物产量的增加。

For all of our agricultural history, crop yields were low and stagnant.

在我们整个农业历史中，农作物产量一直很低并且停滞不前。

Advances in agriculture and fishing  allowed huge crop yields for exporting.

农业和渔业的进步为出口带来了巨大的农作物产量。

This would significantly increase crop yields while reducing the demand for irrigation and fertilizer.

这将显着提高作物产量， 同时减少对灌溉和肥料的需求。

More extremes of weather are expected, and these, in turn, will reduce crop yields.

预计会出现更多极端天气， 而这些反过来又会降低农作物产量。

The researchers believe their findings could help genetically reprogram plants to maximize crop yields.

研究人员相信他们的发现可以帮助对植物进行基因重组，以最大限度地提高作物产量。

Advances in technology have improved crop yields by over 30%.

【technology】科技的进步使庄稼的产量提高了 30% 以上。

That soil loss reduces global crop yields by as much as if we took a California-sized swath of farmland out of production every decade.

土壤流失减少了全球农作物产量，相当於每十年荒废一块加州大小的农地。

The understanding of photosynthesis has profound implications, from improving crop yields to inspiring solar energy technologies.

对光合作用的理解具有深远的影响，从提高作物产量到启发太阳能技术。

Over the last century, across many countries and many different crop types, crop yields have skyrocketed.

上个世纪，许多国家和许多不同作物类型的作物产量猛增。

Rocha and his colleagues believe that maximizing bat populations can help to boost crop yields and promote sustainable livelihoods.

Rocha 和他的同事认为，使蝙蝠种群数量最大化有助于提高作物产量并促进可持续生计。

A crop scientist at Hunan Agricultural University, Professor Yuan developed hybrid rice varieties that increased crop yields over 20 percent.

湖南农业大学作物科学家袁教授培育出杂交水稻品种， 使作物产量提高了 20% 以上。