您要查找的是不是：
- 背板backboard
- 背的neural
- 把这些单词背熟。Learn these words off by heart.
- 背靠back on
- 背痛backache
- 背胶application of gum
- 背投back projection
- 背斜anticline
- 背对back to
- 背上back
- 断背brokeback
- 背对背back to back
- 背袋haversack
- 背向trailing direction
- 腰酸背痛have a pain in the back
- 背对着back on to
- 背着某人behind sb.'s back
- 男孩看到背上有崭新鞍子的小马。The boy saw a pony with a brand-new saddle over its back.
- 我的英语课很无聊，老师总叫我们背单词。My English lesson is boring, the teacher always asks us to recite words.
- 倒背如流know sth. thoroughly by heart
