الطلاب ، مجموعة ، لقاء ، نقاش ، العصف الذهني ، مراسلة ، اجتماع فريق ، دراسة ، درج ، سلم ، جامعة
Public Domain
علامات الصورة:
الصور ذات الصلة الخالية من حقوق الملكية
- Public Domain
- Public Domain
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