惯例 convention; usual practice; customary rule; customs and usages; routine 国际惯例 international practice; 操作惯例 working rule; 按照惯例 by customary rule; follow the practice of; 违背惯例 out of usual practice; 公认的惯例 a recognized practice; 打破惯例 break away from practices [customs]; 惯例法 code of practice; conventional law