บทคัดย่อ, เนื้อผ้า, พื้นหลัง, สามเหลี่ยม, ฝังกลบ, สี, สดใส, ทางเรขาคณิต, สีน้ำเงิน, มืด, ลาด
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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