Defensive systems failing.

防御系统失效。

youdao

I also believe that it is entirely legitimate for our discussions to talk not only about offensive-weapons systems, but also defensive-weapons systems,".

VOA: standard.2009.07.15

There is a crew of four: A commander and co-pilot, and offensive and defensive systems officers.

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The agreement allows the United States to use whatever defensive systems it deems necessary in areas under its control.

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Incongruously, the ancient City Wall wraps itself seamlessly around the metropolis, one of the largest ancient military defensive systems in the world.

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