A lesson could be drawn from the study of it when we are working out our present grain policy.

探究此次米荒风潮形成的原因，对我们当前制定和完善粮食政策有借鉴意义。

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In 1831, an Irish American farmer and inventor named Cyrus McCormick invented the mechanical reaper, which was drawn by a horse and made it possible to harvest as much grain in a day as a dozen men with scythes.

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