ยาหยอด, น้ำ, น้ำมัน, ใกล้ชิด, สีน้ำเงิน, ใต้น้ำ, ภูมิหลัง, วิทยาศาสตร์, บทคัดย่อ, ฟอง, เปียก
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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