有时候您的网络服务供应商（ISP）或政府单位会过滤阻挡通往洋葱路由网络的连接，因此 Tor 浏览器有内置一些能够绕过这类过滤机制的规避工具，它们通常叫作“可插拔传输层”，您可以参考此网页可插拔传输层以获取更多关于各种目前可以使用的规避工具。

Tor Browser currently has four pluggable transport options to choose from.

使用可插拔传输

To use pluggable transports, click 'Configure' in the Tor Launcher window that appears when you first run Tor Browser.

You can also configure pluggable transports while Tor Browser is running by clicking on the onion icon to the left of the address bar, then selecting 'Tor Network Settings'.

Select 'Tor is censored in my country,' then click 'Select a built-in bridge.' Click on the drop-down menu and select the pluggable transport you'd like to use.

Click 'OK' to save your settings.

我应该使用哪种传输？

在洋葱路由启动器中所罗列的可插拔传输层，其运作原理各不相同（请参考 可插拔传输层以了解更多相关信息），且产生的效果也会视您的的实际情况而定。

If you are trying to circumvent a blocked connection for the first time, you should try the different transports: obfs3, obfs4, fte, and meek-azure.

如果您试过了上述的全部选项后还是不能上网，那就得手动输入网桥地址了。请参考网桥部分以进一步了解网桥的运作原理与获取方式。