为使救援车辆通行无阻，要保持街道畅通。

Keep streets clear for the passage of emergency vehicles.

youdao

好的，现在任何程序不管它运行多长时间，我们都可以让它通行无阻，并且为它运行提供保护。

Well, we can pass in the code of any program that's been running for a long time and ensure that it's working.

youdao

在一些大型车辆禁止通行的大都市，它也可以畅通无阻。

It is also allowed in certain metropolitan areas that larger cars are not.

youdao