这些拖拉机实际上自行驱动，而司机则利用互联网销售谷物粮食。

They practically drive themselves, while the driver USES the Internet to sell corn.

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知识发生的变化过程中，谷物粮食储存是非常重要的实际用途。

Knowledge of changes occurring in the course of cereal grain storage is very important for practical purposes.

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在中国的粮食进口结构中，小麦占据了绝对的位置，在所有谷物粮食的进口中所占比例超过80%。

And in China, the wheat importation is also the most important which accounts for more than 80% of the importation of all the grain.

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