剑桥词典 doorstep noun [C] (STEP) a step in front of an outside door （門前的）台堦 He left the package on the doorstep. 他把包裹畱在了門前的台堦上。 doorstep noun [C] (BREAD) UK a very thick piece of bread 厚麪包片 習語on sb's doorstep 返回 doorstep