school bag基本解释
书包；
school bag网络解释
1. 书包：80. hat 帽子 | 81. schoolbag 书包 | 82. pen 钢笔
2. 學用品：2. 人物: girl, boy, teacher, student, classmate | 3. 學用品:pen, pencil, ruler, eraser, pencil box, book, schoolbag, desk, chair | 2. 身體部位:hand, finger, foot, eye, nose, mouth, ear
3. 书包 (特指上学背的书包)：bag 书包 | schoolbag 书包 (特指上学背的书包) | scissors 剪刀
