关心
确定
证书
区别
certificate：n. 证书；文凭，合格证书；电影放映许可证 v. 发给证明书，用证书证明
例句：A certificate is an official document that you receive when you have completed a course of study or training.
句意：证书是你完成一门课程或培训后收到的官方文件。
