【Key words】 eco-agricultural model; developmental principle; integrated technology; demonstrating; spreading; Hunan province
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developmental principle
发展原则
以上为机器翻译结果，长、整句建议使用 人工翻译 。
This study was designed to investigate the developmental principle and characteristics of pencil grasps in preschool children by mean of their drawing circles.
以握笔画圆为测查任务，考察了学龄前儿童握笔姿势的发展趋势及特点。
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