สาว, เด็ก, เป็นมนุษย์, นักเรียน, ผู้ฝึกงาน, การอบรม, เรียน, การศึกษา, อาชีพ, งาน, ประวัติหลักสูตร
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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