我是说，它们使得阿芝克特人能够在农田不足的地方种植大量可食用作物。
I mean, they enabled the Aztecs to grow plenty of food in an area without much available farmland.
芋头是热带性可食用作物，球茎含有刺激因子。
Taro (Colocasia esculenta L. Schott), a tropical edible crop, contains an irritant factor in corm.
美国、欧洲和巴西的国家政策都支持使用食用作物来生产燃料。
National policies in the United States, Europe and Brazil support the use of food crops to produce fuel.
困难的问题是，仍在等待怎样获得与蒸散而损失的水相对应的食用作物产出。
The difficult problem that still awaits an answer is how to get higher yields from food crops without a commensurate rise in the loss of water through evapotranspiration.
生活中不起眼的土豆，其实是世界上第四大食用作物，全球范围内，每年产量约为3.3亿吨。
The humble potato is in fact the world's fourth largest food crop, with a global annual yield of around 330 million tonnes.
不过现在有很多生产商正试图用作物废料和生长速度很快的软茎黍、杨树等非食用作物来制造更为清洁的新一代乙醇燃料。
But companies are racing to make cleaner, next-generation ethanol from sources including crop waste and rapidly growing non-food crops like and poplar trees.
目前，札幌控股正与日本冈山大学的生物学家杉本学合作开发这一项目。杉本学一直在参与俄罗斯太空食用作物项目的开发与研究。
The company teamed up on the project with Okayama University biologist Manabu Sugimoto, who has been part of a Russian space project to explore ways to grow edible plants in space.
目前，札幌控股正与日本冈山大学的生物学家杉本学合作开发这一项目。杉本学一直在参与俄罗斯太空食用作物项目的开发与研究。
The company teamed up on the project with Okayama University biologist Manabu Sugimoto, who has been part of a Russian space project to explore ways to grow edible plants in space.
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