同学们都腰板挺直，两只胳膊重叠做好，认真的听老师讲课。
Schoolmates the wainscot is stiff, two arms overlap complete, earnest listens to teacher to teach.
同学们都腰板挺直，两只胳膊重叠做好，认真的听老师讲课。
Schoolmates all, the waist and back is straight and upright, two arms overlapping is ready for, listen to a teacher seriously give a lecture.
同学们都腰板挺直，两只胳膊重叠做好，认真的听老师讲课。
Schoolmates all, the waist and back is straight and upright, two arms overlapping is ready for, listen to a teacher seriously give a lecture.
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