默契的英文单词:Tacit understanding，Tacit agreement， secret agreement ，1. （心照不宣） tacit agreement; tacit understanding: cooperate very well;配合默契have a tacit mutual understanding; coordinate by tacit agreement互相默契2. （秘密约定或协定） secret agreement：The two parties reached a secret agreement long ago.双方早有默契。
霏霏头头
