step·wise /-ˌwaɪz/
  (a.)樓梯式的,逐步的
  stepwise
  按步
  stepwise
       adj : one thing at a time [syn: bit-by-bit, in small stages, piecemeal,
              step-by-step]
       adv : proceeding in steps; "the voltage was increased stepwise"
             [syn: step by step]