并列题名：20 principles on the practice of OKR 20 principles on the practice of OKR 并列题名：Principles and practice of Aolp 并列题名：Principle and practice of CDN 并列题名：Principles and practices of IPFS 并列题名：Principles and practice of Stellar 并列题名：ERP principle and practice 并列题名：Principles and practice of dialysis 并列题名：Principles and practice of COVID-19 并列题名：Core principles and design practices of OLAP engines