The correct choice of tillage way to resist drought is an important task for study.
如何选择正确的耕作方式抗旱保丰收已经成为多年来一直探索的重大课题。
The restoration and rebuilding of damaged cement concrete pavements are an important task for study in home researches in recent years.
水泥混凝土路面破损修复和改建是近年来国内研究的一大课题。
The restoration and rebuilding of damaged cement concrete pavements are an important task for study in home researches in recent years.
水泥混凝土路面破损修复和改建是近年来国内研究的一大课题。
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