原发性高血压（primary hyertention)（名词解释)

在SQL语句中Primary Key用来表示外键。（)

【C8】A．basicB．secondaryC．formalD．primary

primary structure of protein

Primary Health Care （名词解释)：

" PrimAry HeAlth BAre"是指“低级卫生保健”。（)

Safety is always my primary concern.