1.phasein:V.tointriducesomethinginstagesorgradually
逐步采用或实施
Thegovernmentisgoingtophaseinthenewpensionschemeoverfiveyears,
政府将在五年内逐步实施新的退休金计划.
2.phaseoutv.tostoporremovesomethinginstagesorgradually
逐步结束或淘汰
Thebusservicetocountryareasisbeingphasedout
通往农村的公共汽车服务正在被逐步取消.
希望对你有所帮助.