Motivation in learning is one of the key factors for effective instruction.
学习动机是有效教学的关键因素之一。
To the rock filling roadbed, there is no effective instruction for the control of compaction quality in the current criterion.
对于填石路基填料，现行规范对其压实质量的控制缺乏有效指导。
To the rock filling roadbed, there is no effective instruction for the control of compaction quality in the current criterion.
对于填石路基填料，现行规范对其压实质量的控制缺乏有效指导。
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