英语语法分析

It explicitly states that user Xray can only read.

它明确地声明用户 Xray 只能读。

The sixth rule denies write access to user xray if user xray is a member of groups chatt and spyi.

第六个规则指定，如果用户 xray 是 chatt 和 spyi 组的成员，就拒绝他写。

Objective: to study the relationship between clinical manifestation and hand Xray in rheumatoid arthritis.

目的：探讨类风湿关节炎患者手部X线的表现与临床指标关系。