While literary theory emphasizes consistency and expository argument, poetics is often unruly and partial.But the virtue of poetics is just that it is provisional, contingent, and context depended.

• 它不同于文学理论强调连贯性和辩论性，诗学却常常表现出随意性和片面性，而诗学的优势恰恰在于即兴性、偶然性和对文本的依赖性。