1·Barley was an unexpected find: the crop was domesticated in Western Eurasia and didn't become a staple food in central China until about 2,000 years ago, according to the researchers.
研究人员说，大麦是一个意外发现：这种作物生长在欧亚大陆西部，直到大约两千年前才成为中国中部地区的主食。
2·Barley was an unexpected find: the crop was domesticated in Western Eurasia and didn't become a staple food in central China until about 2, 000 years ago, according to the researchers.
研究人员说，大麦是一个意外的发现：这种作物在欧亚大陆西部被引进，直到大约2000年前才成为中国中部地区的主食。
3·Rice is the staple food of more than half the world's population.
大米是世界上半数以上人口的主食。
—— 《柯林斯英汉双解大词典》
4·For people in sub-Saharan Africa, where white corn is a staple food, substituting this biotech variety could help them meet their daily recommended intake of vitamin A and folate.
生活在非洲下撒哈拉地区的人们以白玉米为主食，改换成这一生物工程品种可以帮助他们获得每日所需的维生素和叶酸。
5·Rice production, the staple food of most of Asia, is already moving northwards, forcing millions of people to change ways of living that have sustained them for centuries.
亚洲大部分地区的主食作物水稻生产已经向北转移，这迫使数百万人口改变持续了数百年的生活方式。