英汉词典

1.For several decades, a lot of research work have been done by many scholars and experts to improve tractors tractive and appendiculate performance and many achievements have been obtained.

近几十年来，国内外许多学者、专家对如何提高拖拉机的牵引附着性能作了大量的工作，取得了较好的效果。

2.For several decades, a lot of research work have been done by many scholars and experts to improve tractors tractive and appendiculate performance and many achievements have been obtained.

近几十年来，国内外许多学者、专家对如何提高拖拉机的牵引附着性能作了大量的工作，取得了较好的效果。

3.So small tractors fitted with iron wheel with lugs can improve tractive and appendiculate performance of tractor in dry land.

表明小型轮式拖拉机叶轮与胶轮并装可提高旱地作业，特别是重负荷作业时的牵引附着性能。