互ㄏㄨˋ通ㄊㄨㄥ有ㄧㄡˇ無ㄨˊhùtōng‑yǒuwú

简互通有无

雙方傳遞訊息、滿足彼此的需求。例「這兩家公司在正式合作前，早已互通有無，密切聯繫」。

英mutual exchange of assistance (idiom), to benefit from each other's strengths and make up each other's shortfalls, to reciprocate with material assistance, scratch each other's back