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III

The book is divided into six chapters which address different aspects of the study of poetry, and a concluding Glossary of poetical terms. It opens and closes by considering matters of definition. The opening chapter's examination of certain key poetic terms which are inescapable in the study of English poetry and its history is intended to offer a more in,depth and expansive treatment of these crucial terms than is available in the Glossary's more concise format. Thus the first chapter, 'The key words of poetry',begins from the starting question 'What is poetry?', a deceptively simple question and one which poets and critics have provided with a series of different answers. From this it then moves on to a historical overview of the matters at issue in the rest of the volume in a discussion of the large taxonomic labels which are used in literary history and university survey courses on English poetry: 'medieval', 'Renaissance', 'neoclassicism','Romanticism' and so on. The detailed consideration of the history of English poetry is outside the province of this book and is not attempted here.Nonetheless, this chapter's focus upon those vexed definitional questions which underpin the historical study of English poetry, quite apart from complementing the attention to terminology and definition evident through,out this volume, also serves as a reminder that poetry should be read with a sense of its historical circumstance and significance.

I

The purpose of this book can be expressed in one sentence. It is intended as an accessible survey of those technical aspects of poetry which students of English literature often see as daunting. It attempts to demystify the study of poetry, aiming to explain the issues in a lively and informative fashion.In effect, Poetry is intended as a route map though the poetic maze, with chapters t>n such essential but often complex issues as rhythm and metre, the use of metaphor in poetry, poetic sound effects and the visual appearance of poetry. Crucially, the book aims to make the jargon of poetry less intimidating, offering clear explanations of poetic terminology allied to close readings which demonstrate how poetry actually works in practice. Its organising principle is tripartite, consisting of the introduction of termin,ology,exposition and illustration. Our hope is that the text will thus provide a stimulating blend of different types of discussion. Throughout, poetic terms are introduced, explained and demonstrated by citation and analysis.The latter aspect is perhaps the most crucial to the reader. The study of poetic devices, like the study of the terminology of all intellectual disci,plines,is best addressed by examples of how poets have actually used these devices. Consequently, each chapter contains several sustained set,.piece readings of poems chat are presented as illustrations of the critical readings readers can learn to perform for themselves. It is our hope chat this book will allow students co move away from the feeling chat the formal aspects of poetry are matters which make sense only to a few initiates, and that they will, as a consequence, feel comfortable with these issues in a manner which will directly and practically inform their wider reading and studying of English poetry. If this book can prompt a sense amongst its readers that the technical analysis of poetry is both valuable and something which is well within their intellectt1al grasp, theq its purpose will have been achieved.

近年來，腸道菌群與人體健康和疾病的關係受到關注，該領域相關研究持續增長，積累了大量的數據信息。這些菌群數據類型複雜、數量龐大，但蘊含着研究和應用價值。如何從海量零散的數據中挖掘出與人類健康和疾病緊密相關的信息，這成為腸道菌群領域關注的首要問題。一方面，腸道微生物的種類和豐度與基因表達陣列不同，更易受到飲食、地域等各種因素的影響，不同人群之間腸道菌群組成可能存在較大差異，這使得直接基於菌群豐度整合數據並進行生物標識物挖掘的方法必然產生偏差；另一方面，微生物豐度矩陣過於稀疏，常規計算方法也很難基於此稀疏矩陣對不同批次的豐度進行校正。因此，建立更為高效的算法模型來解讀複雜菌群數據的內在規律，顯得迫切和重要。

近日，中國科學院海洋研究所研究員段繼周課題組在Chemical Engineering Journal上發表關於水性納米複合塗層防腐和防污性能的最新研究成果，為環保型防腐防污塗料研發提供了新思路。

中國基金報記者 若暉

自美聯儲3月開啟新一輪加息周期以來，美股便進入了震盪下跌模式。除了科技股之外，相對穩健的消費股也受到了打擊。截至上周五，標普500和納斯達克指數年內跌幅分別為18.14%、27.42%，兩者均為連續第七周下跌，創下約10年來最長連跌周。