This implementation offers no level of security.
这种实现毫无安全性可言。
There is no level of radiation that is completely safe.
不存在任何绝对安全的辐射能级。
Results. There were no Level I or II evidence on this topic with our search.
结果：通过检索发现在这一主题下没有证据水平为I或II的文献。
Results. There were no Level I or II evidence on this topic with our search.
结果：通过检索发现在这一主题下没有证据水平为I或II的文献。
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