架空

1. built on stilts

♦ 这里的竹楼都是~的。 The bamboo huts here are all built on stilts.

2. impracticable; unpractical

♦ 不采取相应的措施, 计划就会~。 Unless we adopt the necessary measures the plan will come to nothing.

3. make sb. a mere figurehead

~管道 overhead pipe