求翻译：During the phallic phase the child becomes aware of their genitals and sexual differences. Consequently, development is different for boys and girls. Freud proposed that during this phase of development, boys fantasize about their mothers and girls fantasize about their fathers. In boys this is reaction is known as the Oedipus complex. These three phases of development are thought to be particularly important in personality development.是什么意思？

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