... tractor alternator；拖拉机交流发电机 tractor application；拖拉机应用 tractor arrangement；拖拉机布置 ...
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special application tractor 专用拖拉机
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Greater fertilizer application, improved response to fertilizer, better tractor technology, better tillage practices, old-fashioned genetic selection, and new-fashioned genetic engineering all conspire to raise yields, year after year.
FORBES: Global Warming And Global Food Security
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