vane

名词 vane:

1. flat surface that rotates and pushes against air or water
   同义词：blade
2. mechanical device attached to an elevated structure; rotates freely to show the direction of the wind
   同义词：weathervane, weather vane, wind vane
3. a metal fin attached to the tail of a bomb or missile in order to stabilize or guide it
4. the flattened weblike part of a feather consisting of a series of barbs on either side of the shaft
   同义词：web

1. In winter the weather vane often freezes up.
   气象风向标在冬季经常僵立不动。
2. There is a vane on top of the building.
   在大楼的顶端有一只风信旗。