Any of the recurring stages of variation in the illumination and apparent shape of the moon or a planet.

(行星在各时期所呈现的)盈亏现象。

Any of the changing appearances that an object my take.

物体之任何变像。

One side of a subject.

(事务的)一面；方面。

Any one stage or period in the development of anything.

(任何事发展的)阶段；过程；时期。

Position or stage which a periodic phenomenon, such as a wave, has reached at a given time with reference to a starting point.

【理】相位。

Portion of a heterogeneous system which is homogeneous, as the ice in a mixture of ice and water.

【化】异形中同质的部分；如冰和水混合中的冰。

To put in phase.

使同相；使时间上相配合。