因为整个句子有真正的主谓语,即Employment和has become ,issue 与 facing 之间只是意思（意义）上的主谓关系,所以issue就是逻辑主语,而分词短语facing university students即为逻辑谓语,再如：Do you mind my openin...照你这么说的话，issue是逻辑主语，university students是逻辑宾语，那意思岂不是“问题面对学生”吗？我的理解是issue应该是逻辑宾语，university students是逻辑主语，这样意思就是“学生面对问题”。或者说照我的理解，应该是Employment has become a prominent issue that university students face.