较厚的已结书图标 : 参考符号轮廓矢量设计创成人工智能研究. 厚封闭书的强健黑色轮廓矢量图图标. 代表内容广泛的综合研究和有价值的参考材料. 理想的学术资源数字教科书或档案显示矢量设计中蕴含的丰富信息

紫色精装书

一本纯白色、封闭的书，直立放置在平面上

一本纯白色的封闭书籍，直立放置在平面上

一本平放在平面上的打开的书，上面压着一本合上的书

闭合笔记本或平板设备的极简素描

a vibrant orange book with glossy cover and sturdy spine the image showcases single is closed standing upright against white

中性灰色背景中优雅的封闭浅粉色皮革个人组织者或规划者

一本带有黑色封面和黑色松紧带封面的空白笔记本

一本时尚现代的灰色笔记本，采用极简设计

放在平整表面上的优雅棕色皮质装帧书籍

一本闭合的蓝色书本，直立放置

黄色硬皮书在白色背景上隔离

a spiral bound notebook with white cover and brown spine this image shows the is closed binding visible on left side of plain

a sleek modern gray notebook with minimalist design and clean lines this image showcases the is closed smooth matte finish that

印有数字 22 的复古拉链透明塑料袋

this image showcases a closed red notebook with a smooth glossy cover the notebook appears to be made of a sturdy material with a

a sturdy grey binder standing upright against plain background the image shows closed colored with smooth textured surface has tab

一本时尚的蓝色精装书，垂直立在纯色背景前

睫毛剪贴画9黑白睫毛设计

白背景中的桂冠与经典胜利与成就象征

带金属把手的质朴木门

一本经典的棕色皮面笔记本，直立放置，封面关闭

极简主义教育笔记本图标 - 学术期刊线条矢量图

优雅的橙色和灰色布面书，直立放置在纯色背景上

鞋子的简单轮廓