L-plate

US 
UK 
  • n.学车牌(在英国等地学驾驶时置于车上的白底红字标志)
  • Web铁三角;角钢板
Plural Form:l-plates  
L-plate
n.
1.
红 L 字牌,学车牌(在英国等地学驾驶时置于车上的白底红字标志)(in Britain and some other countries) a white sign with a large red letter L on it, that you put on a car when you are learning to drive