第三人称单数：phases out 现在分词：phasing out 过去式：phased out
1.使逐步结束;使逐步撤出;逐步淘汰;逐部停止(活动等)
2.(动作等的)逐步停止;逐步撤出
3.逐步转入 (into)
1.to gradually stop using something
phases outphases outphases out