小复习 classroom blackboard picture 教室 黑板 图画 window 窗户
blackboard是在线教学管理系统,通过这个平台我们可以访问ntulearn上
单 learn 词 学习,学到 a lot of word 很多 单词,词 blackboard say
blackboard mobile learn
blackboard learn
Tips:Do Not Provide
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