安全的X射线防护措施，对个人和群体绝无x射线电力辐射伤害。

Safety protection measures of X rays, for individuals and groups without X ray power radiation injury.

youdao

青少年是一个自我防护意识和自我控制能力都相对薄弱的群体，青少年的网络成瘾行为是受其特有的心理特点影响的。

Young is a group whose self-protective consciousness and self-control ability are weak. Net addiction of young is affected by a special psychological characteristic.

youdao