stepstone

n. 楼梯石级

词形变化

stepstones 复数 stepstones

释义与例句

n.
  1. 1.

    A stone laid before a door as a stair to step on when entering or leaving the house; a doorstep.

  2. 2.

    A stepping stone

    比喻

词源

From step + stone.

来源：wiktionary