ชาย, เริ่มต้นขึ้น, หลอดไฟฟ้า, ความคิด, คิด, แล็ปท็อป, งาน, การศึกษา, เรียน, ความรู้, ข้อมูล
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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