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。

youdao

Maybe have a class that hides the raw details of your persistence mechanism, but for now uses SQL strings underneath it.

可能会需要有一个类用来隐藏持续机制的原始细节，但眼下还是使用SQL字符串。

youdao

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