This new edition of DB2 on Rails adds an extra layer of security, thanks to the fact that these "safe" calls are translated into parameterized queries, which are immune to SQL Injection attacks.
DB 2 on Rails的这个新版本添加了一层额外的安全性，这要归功于这样一个事实：这些“安全”调用将转换为参数化查询，而参数化查询对SQL注入攻击免疫。
The raw operator is new to Rails 3. Counter to previous releases of Rails, all strings are emitted safe, stripped of HTML, by default.
raw操作数是Rails 3中新增的功能。与以前版本的Rails不同，默认情况下所有的字符串都可以(去掉了HTML)安全发送。
The first combination form is a small multiple use table and an infanette with guard rails and feet, which are safe and practical.
组装形式之一为带有护栏和底脚的婴儿床及多用小桌，安全实用。
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