本来应该开垦土地、播种冬季作物的拖拉机，现在被用来挖掘防火沟，以防止大火蔓延到农田。
Tractors that should now be ploughing land for sowing winter grain have been mobilised to dig trenches round fields to stop forest fires encroaching on farmland.
拖拉机、普通收割机、联合收割机，以及上百种其他不同的机器让农民获得了他们需求已久的机械优势，来减轻他们的负担并使他们的土地真正赢利。
The tractor, the reaper, the combine, and hundreds of other machines gave farmers the mechanical advantage they had long needed to ease their burdens and make their lands truly profitable.
中国不仅购买豪车和房子，同时也购买拖拉机和挖掘机为建设大量新建筑腾出土地。
And Chinese money is buying not only cars and property, but also the tractors and backhoes that are preparing the ground for a new lot of buildings.
笔者将在此基础上．推导出履带式拖拉机的车辙大小的理论公式及其沿疏松土地行走时的运动阻力系数。
Based on the achievements obtained. the theoretic formula that determine the rut size of the caterpillar tractor and the friction drag coefficient of motion was deduced.
虽然使用拖拉机等机械以及施用化肥可以提高农业产量，但是土地最终所能产出的粮食只有那么多，不会再增加。
Although agricultural production can be increased by use of machinery such as tractors and the addition of fertilizer, the land ultimately can produce only so much food and no more.
在伊利诺斯州普莱诺，农民比尔·怀克斯开拖拉机已经近40年了，在这片家族长期拥有的土地上，他播种并收获玉米和大豆。
Plano, Illinois, farmer Bill Wykes has been behind the wheel of a tractor for almost four decades, planting and harvesting corn and soybeans on land his family has owned even longer.
这些新拖拉机比旧的能多耕一倍面积的土地。
These new tractors get over twice the acreage that the old ones used to cover.
由于每一码土地的情况都不尽相同，拖拉机的计算机会根据土壤的具体条件，提供相应数量的灌溉用水、化肥、杀虫剂以使土地的产量达到最优。
The tractor's computer then delivers varying amounts of irrigation water, seed, fertilizer, and pesticides to optimize the production of the land as its condition varies yard by yard.
由于每一码土地的情况都不尽相同，拖拉机的计算机会根据土壤的具体条件，提供相应数量的灌溉用水、化肥、杀虫剂以使土地的产量达到最优。
The tractor's computer then delivers varying amounts of irrigation water, seed, fertilizer, and pesticides to optimize the production of the land as its condition varies yard by yard.
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