reciprocating
adj.
"moving back and forth," 1690s, present participle adjective from reciprocate, v.. Specifically of machines by 1822.
词汇 | reciprocating |
词根词缀 | Online Etymology Dictionary reciprocating adj. "moving back and forth," 1690s, present participle adjective from reciprocate, v.. Specifically of machines by 1822. |
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