“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A passport that is out of date is invalid.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.