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