reciprocating
形容词 C2中文： 往复式的、互惠的
- That moves back and forth or up and down.
- Of an engine type, that has one or more pistons that move back and forth or up and down.
- Of an other machine, whose mechanism relies on a back and forth or up and down motion.
- Of a person or their actions, responding in kind. · reciprocating behavior
在真实文章中学习reciprocating
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