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
N-COUNT(英国的)“实习”标志(贴于车上以提醒其他驾驶者) In Britain, L-plates are signs with a red 'L' on them which you attach to a car to warn other drivers that you are a learner.