回原处

back(adverb)

to, or at, the place or person from which a person or thing came

（人）背部

back(noun)

in man, the part of the body from the neck to the bottom of the spine

倒退

back(verb)

to (cause to) move backwards

后退

back(adverb)

away (from something); not near (something)

（动物）背部，后面

back(noun)

in animals, the upper part of the body

支持

back(verb)

to help or support

向后

back(adverb)

towards the back (of something)

背面

back(noun)

that part of anything opposite to or furthest from the front

下赌注在...上

back(verb)

to bet or gamble on

后面的

back(adjective)

of or at the back

答复

back(adverb)

in return; in response to

（足球等的）后卫

back(noun)

in football, hockey etc a player who plays behind the forwards.

回溯

back(adverb)

to, or in, the past