ทักษะ, สมรรถนะ, สมอง, ใจ, ความรู้, การศึกษา, แรงจูงใจ, เป้าหมาย, วิสัยทัศน์, ความคิดสร้างสรรค์, แรงบันดาลใจ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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