Out of the box, the appliance is set to let all traffic pass, leaving the user to specify which types of traffic are blocked (via packet filtering).

盒子之外，设备被设为允许任何流量通过，让用户指定阻塞哪些流量(通过包过滤)。

youdao

When the rear windshield is blocked, then you will lose the driving rear part of the field of vision on the road or reversing, greatly reduce the traffic safety, so the rear wiper is as important as.

当后挡风玻璃被遮挡，那么你行驶在路上或者倒车时将失去后方部分视野，大大降低行车安全性，因此后雨刷一样重要。

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The street is blocked to traffic.

街道交通受阻。

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New technology that would allow more planes to fly but put air-traffic controllers out of work is blocked by unions.

ECONOMIST: Is more regulatory reform the answer?

If you hear a traffic report that the road ahead is blocked, it is only useful if you haven't already passed the last place that you could divert to avoid the problem.

BBC: Your comments: Spring series 2009

And North Avenue, which is also a major connecting road and the location of the local Staples High School, is still blocked in places to traffic due to downed trees and at least one fallen utility pole.

FORBES: Living With Downed Trees And No Power In Fairfield County, CT