
phase
词源
源自希腊语'phasis'(外观,现象),通过拉丁语'phasis'和法语'phase'传入英语,最初用于天文学指月相。
noun
❶ 指事物发展过程中的某个特定阶段或时期,通常具有明显的特征或变化。
“The project is now in its final phase.”
(这个项目现在处于最后阶段。)
“Adolescence is a difficult phase for many teenagers.”
(青春期对许多青少年来说是一个艰难的阶段。)
❶ 物理学中指波动或周期性现象在某一特定时刻的状态或位置。
“The two waves are out of phase with each other.”
(这两个波的相位不一致。)
“The engineer adjusted the phase of the alternating current.”
(工程师调整了交流电的相位。)
verb
❶ 分阶段实施或引入某事物,通常指有计划地逐步进行。
“The new policy will be phased in over two years.”
(新政策将在两年内逐步实施。)
“They're phasing out the old model of the car.”
(他们正在逐步淘汰这款车的旧型号。)
常见短语
phase out — 逐步淘汰或停止使用某物,通常指有计划地减少直到完全停止。
“The company is phasing out plastic packaging.”
(该公司正在逐步淘汰塑料包装。)
in phase — 指两个或多个周期性现象同步发生,或指计划与实际情况相符。
“The speakers need to be in phase for proper stereo sound.”
(扬声器需要同步才能获得正确的立体声效果。)
phase in — 逐步引入或实施某事物,通常指有计划地分阶段进行。
“The new curriculum will be phased in starting next semester.”
(新课程将从下学期开始逐步实施。)