[transitive] (usually be phased) to arrange to do sth gradually in stages over a period of time
分阶段进行；逐步做◆The closure of regional offices was phased over a two-year period.
地区办事处在两年的时间内分阶段关闭。
●ˌphase sth ˈdownto reduce sth gradually in stages over a period of time
逐步减少；分阶段减少；分期分批减少◆We are phasing down production of less profitable lines.
我们正逐步减少利润较低的生产线的产量。●ˌphase sth ˈinto introduce or start using sth gradually in stages over a period of time
分阶段引入；逐渐采用◆The new tax will be phased in over two years.
这项新税种将在两年内逐步实施。●ˌphase sth ˈoutto stop using sth gradually in stages over a period of time
逐渐淘汰；逐渐废除◆Some companies agreed to phase out the testing of cosmetics on animals.
有一些公司同意逐步停止在动物身上进行化妆品试验。