primary time standard的意思|示意
初级时间标准
primary time standard的网络常见释义
基本时间标准 ... 二级时间标准 secondary time standard 基本时间标准 primary time standard 频率时间标准 frequency time standard ...
primary time standard相关短语
1、 primary time and frequency standard 原级时频标准
2、 time and frequency primary standard 时间频率基准
primary time standard相关例句
BACKGROUND: at the present time, liver transplantation has become a standard treatment for the end-stage liver disease and primary liver cancer.
背景：当前，肝移植已经作为各种终末期肝病以及肝脏恶性肿瘤的常规治疗手段。