ต้นไม้, ธรรมชาติ, เยื่อหุ้มสมอง, ลำต้น, เนื้อไม้, ป่า, ภูมิหลัง, ใกล้ชิด, แบบแผน, เก่า, บทคัดย่อ
Public Domain
ภาพถ่ายปลอดค่าลิขสิทธิ์ที่เกี่ยวข้อง
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