He says that as a child he did not understand why his father did not live with him and his mother all of the time.

VOA: special.2009.12.13

Here, the issue in this poem is grief, how the mother and father each express how they deal with the death of their child.

这首诗谈论的问题很悲伤，这个父亲和母亲表达,他们对死去孩子的处理方式。

耶鲁公开课 - 现代诗歌课程节选

and it's a memorable thing to see that a mother or a father donates to a child.

看见一个母亲或者父亲给孩子捐赠，这很让人难忘。

挽救生命的工作 - SpeakingMax英语口语达人

The question is: The conflicts in psychosexual development always assumes that a child has a mother and a father, one of each, in a certain sort of familial structure.

他提的问题是：,弗洛伊德在描述性心理发展过程中,总是假设孩子是拥有父母的，是处于特定的家庭结构之中的。

耶鲁公开课 - 心理学导论课程节选