| 单词 | back-and-forth |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔back-and-forth〕An agreement was finally reached after a lot of back-and-forth between the two sides.双方经多个回合的谈判之后最终达成了一项协议。韦氏高阶〔reciprocation〕An alternating back-and-forth movement.往复运动：交互地前后运动美国传统〔seesaw〕A back-and-forth or up-and-down movement, as of the lead between two contesting parties.拉锯式的动作，一起一伏的交替过程：上下或前后交替移动的动作，如比赛或竞争双方交替占优势美国传统〔swing〕These verbs mean to move in a back-and-forth, up-and-down, or to-and-fro pattern.这些动词表示前后、上下或往复运动。美国传统 |
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