劍橋詞典 doorstep noun [C] (STEP) a step in front of an outside door (門(mén)前的)臺(tái)階 He left the package on the doorstep. 他把包裹留在了門(mén)前的臺(tái)階上。 doorstep noun [C] (BREAD) UK a very thick piece of bread 厚面包片 習(xí)語(yǔ)on sb's doorstep 返回 doorstep