For both wheat and maize, the results, published this week by Science, were negative.
关于小麦和玉米的研究发表在本周的《科学》杂志上，结果是否定的。
IT IS the world's fourth-most-important food crop, after maize, wheat and rice.
在世界的粮食作物中，它的重要性仅次于玉米、小麦和稻谷。
The principal crops are corn (maize), wheat, cotton, tobacco and fruit.
主要农作物为玉米、小麦、棉花、烟草和水果。
Wheat and maize belong to the grain group.
小麦和玉米都属谷类。
The main types of grain are wheat, corn (maize), and rice.
主要的谷类有小麦、玉米和水稻。
Rice is the world's third largest crop, behind maize ("corn") and wheat.
米是继玉米和小麦之后，世界第三大农作物。
Rice is the world's third largest crop, behind maize ("corn") and wheat.
米是继玉米和小麦之后，世界第三大农作物。
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