説法正確
photo by是意思是有某人拍攝的照片
舉例:
Photo by Russell Lee. Prints and Photographs Division, Library of congress.
國會圖書館打印與複印部。
Image credit: Left, photo courtesy of the author right, photo by Stephen voss.
圖片來源:左為作者自拍照右為斯蒂芬·沃斯拍攝。