People can only eat about 50 percent of grain crops.

人们只能吃大约50%的谷类作物。

Windbreaks can be highly valuable for protecting grain crops. For example, studies have been done on windbreaks in parts of West Africa.

防风林对保护谷物作物来说很有作用，比如，西非部分地区已经对防风林做了研究。

Citing satellite imagery, it said that continual drought has affected grain crops in the part of North Korea long-known as the cereal bowl.

该机构援引卫星图像说，持续的干旱影响了朝鲜长期以来被称为“饭碗”的地区的粮食作物。

I'm especially interested in the potential of perennial grain crops, which are being developed in particular by The Land Institute in Salina, Kansas.

我最感兴趣的是多年生作物的发展潜力，堪萨斯州萨利纳的土地研究所正潜心开发这类作物。

Windbreaks can be highly valuable for protecting grain crops.

防风林对于保护粮食作物非常有价值。

Some have even resolved to planting small grain crops.

有些人甚至决定种植小粮食作物。

Today all we see through the plane's window glass are brown and green jigsaw puzzle pieces alternating between newly cleared jungle, grain crops and the remains of recent harvests.

今天，透过飞机的窗玻璃，我们看到的只是棕色和绿色的拼图，在新清理的丛林、谷物作物和最近收成的残留物之间交替出现。

He got together with a group of scientists, and they bred perennial grain crops which have deep roots that anchor the fertile topsoil of a farm, preventing erosion and protecting future harvests.

他与一群科学家聚在一起，他们培育出多年生的粮食作物， 这些作物的根深蒂固， 可以固定农场肥沃的表土， 防止侵蚀并保护未来的收成。