backward and forward

英 美
  • 来回地,前后地
  • and conj.和;加;接着;那么
  • backward adj.向后的;落后的adv.向后
  • forward adj.向前的;前部的;未来的;将来的;莽撞的;热心的;早熟的adv.向前地v.促进;转交;发送n.[体]前锋
Adverb:
  1. moving from one place to another and back again;

    "he traveled back and forth between Los Angeles and New York"
    "the treetops whipped to and fro in a frightening manner"
    "the old man just sat on the porch and rocked back and forth all day"

    1. He understood automobile engines backwards and forwards.
      他对汽车发动机了解得一清二楚。

【邻近词汇】