backwards/'bækwədz/

1.adverb [move] [ look+] 
向后地

2.adverb [count] [ work+] 
(in reverse) 倒着地

3.adverb [fig] 
倒退地

Technologically, this is a step backwards.
技术上这是个退步。
4.adverb

(in time) 向后地

to move backwards and forwards
来回移动
to know sth backwards {or} > backward and forward
 [US] 极熟悉某事