Wang suggest that the controls work within the browser in the form of "sandboxing" the external code to prevent it from having too much access.
Wang建议以“沙盒”的形式在浏览器内对外部代码加以控制，避免（这些代码）获得过多的权限。
Lua's got a lot of security features I haven't touched on, but you should be aware that it's quite possible to do effective sandboxing even within a single Lua state.
虽然Lua的很多安全性特性我还没接触过，但是应该清楚，即使在一个 Lua 状态中都可以有效地实现沙箱。
Sandboxing a third-party video player is more difficult and requires iframes at the very least.
为第三方视频建立沙盒比较困难，至少需要内联框架。
Sandboxing a third-party video player is more difficult and requires iframes at the very least.
为第三方视频建立沙盒比较困难，至少需要内联框架。
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