片语
Should Reciprocate应该回报
reciprocate casing上下活动套管
reciprocate pump往复泵
to and fro motion往复运动
reciprocate E回报
reciprocate friction往复摩擦
reciprocate motion往复运动
requite报答,回报;酬谢
reciprocate visit互访
return返回;(尤指感觉)恢复;把……退回;以……相报;(网球等)回击(球)
to reciprocate回报
alternate motion交变运动;往复运动