the sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offers support when passing through a doorway
同义词:doorsill, threshold
doorstep例句
News reporters camped upon his doorstep day and night.
一些新闻记者日夜在他门口纠缠不走。
A frightening brew of poisonous waste is said to be accumulating in Britain's biggest chemical dump ... The local authority ... is rightly worried about the ... tip on its doorstep.