dissertations 是 dissertation 的复数dissertationKK [ˏdɪsɚˋteʃən] /ˌdɪsɚˈteɪʃən/发音名词1学位论文、博士论文She spent three years writing her dissertation on urban housing policy.她花了三年写关于都市住宅政策的博士论文。2专题论文、专论正式He published a long dissertation on the origins of folk music.他发表了一篇探讨民谣起源的长篇专题论文。用这个字练口说→