nestablished rule or practice
...place an order for something; a system of fixed quotas for purchasing; order (goods) 定规 nestablished rule or practice; set pattern 定户 nsubscriber (to a newspaper or periodical); a person or household with a standing order for milk, etc.
基于1个网页-相关网页
nestablished rule or practice
既定的规则或惯例
以上为机器翻译结果，长、整句建议使用 人工翻译 。