本课题主要研究美国总统在公开演讲时所使用的政治委婉语。对于美国社会的政治家来说，在政治演讲中选择温和不刺激的语言，能帮助他们说服和影响民众，获得选民支持。通过本课...

When we talk about grammatical metaphor, Halliday is the first person that usually comes to mind. In his early years when he studied on the nature of the language, he came up with an idea that metaphor exists not only at lexical level, ...