ตา, ดู, การสังเกต, เพื่อดู, ควบคุม, การตรวจสอบ, ม่านตา, ผู้สังเกตการณ์, พื้นหลัง
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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