อนุภาค, ธง, ส่วนหัว, พื้นหลัง, บทคัดย่อ, การสั่นสะเทือน, Nexus, เส้น, คลื่น, แบบแผน, แกว่ง
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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