It cares very much , however , about whether a subject is specific " the sky " or not " sky " because the semantic content of the sentence is changed radically by that difference 然而，它非常关心主语是特定的（ “ the sky ” ）还是非特定的（ “ sky ” ） ，因为这一区别会使句子的语义内容发生根本的改变。
