There had been an unspoken agreement between them.他们之间曾有过一种默契。There was an unspoken agreement between the two countries.这两个国家之间有默契。There had been an unspoken agreement between them that he would not call for her at Seymour House.他们之间曾经有过默契，那便是他不会到西摩屋去找她。