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backward and forward的英文翻譯是什么意思，詞典釋義與在線翻譯：
英英釋義
Adverb:
-
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"
backward and forward的用法和樣例：
例句
- He understood automobile engines backwards and forwards.
他對汽車發動機了解得一清二楚。
