数字化学习背景下三维虚拟学习环境的模式与分类研究*--以二语习得语境为例
수자화학습배경하삼유허의학습배경적모식여분류연구*--이이어습득어경위례
On Mode and Classification of 3-Dimensional Virtual Learning Environment under Digital Learning Circumstance:Take the Context for Second Language Acquisition as an Example
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