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1.The farmer used a knifing cultivator to till the soil.
农民使用开垦犁来翻土。
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2.The new tractor has a knifing cultivator that can cut through tough weeds.
新型拖拉机配备了可以砍断顽固杂草的开垦犁。
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3.They used the knifing cultivator to prepare the land for planting.
他们使用开垦犁为种植做准备。