1. 911查询·英语单词
1. chairback：背疼 : backache | 椅背 : chairback | 2. 动词 [指反向] have one's back to
2. chair-backlazyback：chair 椅子 | chair-backlazyback 椅背 | chairborne 内勤的
3. back：chair 椅子 | back 椅背 | seat 座位
4. back of the chair：散光 astigmia | 椅背 back of the chair | 椅高 height of chair top