剑桥词典something very valuable or very useful that is found after searching or effort （經搜索或付出努力後所作的）有利發現 If a salesperson does not quickly hit pay dirt with a customer they will usually move straight on to someone else . 如果銷售員發現某個顧客無利可圖，通常便會轉而尋找另外的顧客。 返回 pay dirt