on stage & on the stage

The oral stage in psychology is the term used by Sigmund Freud to describe the child's development during the first 18 to 24 months of life, in which an infant's pleasure centers are in the mouth. This is the first of Freud's psychosexual stages.

This is the infant's first relationship with its mother; it is a nutritive one. The length of this stage depends on the society. In some societies it is common for a child to be nursed by its mother for several years, whereas this stage is much shorter in other societies.

The phallic stage is the third of Freud's psychosexual stages, when awareness of and manipulation of the genitals is supposed to be a primary source of pleasure. In this stage the child deals with the Oedipus complex, if male, or the Electra complex, if female. According to Freud, this stage first occurs around the age of five and a half years.

2007-06-09 13:03:48 補充：
ON STAGE`on stage` 通常指: 在舞台上演出 ON THE STAGE`on the stage` 有少少不同.

ON STAGE

`on stage` 通常指: 在舞台上演出
eg : She is on stage for most of the play.
( 在这套戏里, 大部分时间她都出场. )
eg : He had a fabulous performance on stage last night.
( 昨晚他在舞台上的演出真是精彩啊. )


ON THE STAGE

`on the stage` 有少少不同. . .
eg : Please put the table on the stage.
( 请把那桌子搬到台上去. )
eg : Jay wants to go on the stage.
( 阿Jay 将来想当演员. ) 在这里, go on the stage = become an actor.


Hope this might help.