“无效的”造句

护照过期是无效的.
A passport that is out of date is invalid.

今天宇航员将会做最后一次尝试,力图把一颗通信卫星从无效的轨道上抢救下来。
Astronauts will make a final attempt today to rescue a communications satellite from its useless orbit.

此外,他们还声称任何这样的干预都是完全无效的
Furthermore, they claim that any such interference is completely ineffective.

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