Security for Wireless Sensor Networks Using Identity-based Cryptography

The text consists of 14 units, each illustrating the language used in a particular situation. The topic-based units cover the language learners need in everyday situations, but also language for more formal situations, such as a seminar or business meeting.Each section contains a list of the most useful phrases, with information on where and when they should be used, and a short sample of a conversation, showing the learner how a typical conversation flows in English.An audio CD contains all the conversations from the book, and allows the user to practice what they have learnt. In addition, the supplement contains all the everyday expressions and language structures that learners need to speak in natural English, organized by function.Each section also contains a glossary of useful vocabulary, making Collins Easy Learning English Conversation: Book 2 an indispensible resource for students who want to build on their conversation skills so that they can speak English fluently and with co

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本書是全球最權威的法英、英法雙向辭典，由 Collins 與 Le Robert 共同編纂，內容完整、結構清晰，特別適合專業人士與高階學習者使用。全書收錄超過31萬個詞彙與片語，以及50萬筆譯例，並更新了網路、環境、經濟等領域的新詞，如 instagrammable、rewilding、fintech、cryptoactif 等。辭典中特設「文化專欄」，說明文學、電影及流行文化中常見詞語的來源，幫助讀者更深入理解法語背景。另附「Language in Use」實用補充，示範作文、電郵與會話中的常見用法，是學術與職場皆實用的工具。亮點：收錄31萬詞彙與50萬翻譯涵蓋最新網路與專業領域詞彙文化專欄延伸語境理解提供真實語境範例，增進流暢表達The world’s leading French to English and English to French bilingual dictionary.A joint collaboration between Collins and Le Robert, revised and updated to cover all the latest vocabulary in both languages – perfect for professionals and advanced learners of French.The world’s leading French to English and English to French bilingual dictionary.A joint collaboration between Collins and Le Robert, revised and updated to cover all the latest vocabulary in both languages – perfect for professionals and advanced learners of French.With more than 310,000 words, meanings and phrases and 500,000 translations.This edition has been revised to include all the latest vocabulary in

值得信賴的專業Collins COBUILD出版字典，全新為進階英語學習者量身打造，告訴你如何正確使用單字，是自學者最好的利器。專為進階英語學習者設計，清楚呈現日常英語詞彙、用法與語感。來自真實語料的例句，搭配語法、同義詞與搭配詞補充，讓你在寫作、口說、學術或商務場合都能得心應手，是學習路上的好幫手。The 9th edition of the Collins COBUILD Advanced Learner’s Dictionary has been revised and updated to include detailed coverage of today’s English in a clear, attractive format.Ideal for upper intermediate and advanced learners of English, this dictionary covers all the words, phrases and idioms that students need to master in order to speak and writeeffective English. Thousands of updated examples taken from the 4.5- billion word Collins Corpus, show learners how the words are used in authentic contexts. The dictionary offers extensive help with grammar through the inclusion of grammar patterns at examples, plus a new supplement to help with academic and business grammar.Additional information is provided throughout to help learners improve their knowledge of collocation, etymology and synonymy. Informative and relevant vocabulary panels

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This new edition of the Collins Pocket English Dictionary provides up-to-date language coverage along with practical guidance on effective English for everyday use. The text is compiled using the late

The text consists of 14 units, each illustrating the language used in a particular situation. The topic-based units cover the language learners need in everyday situations, but also language for more

Collins Easy Learning English Vocabulary is designed to help learners of all ages build their vocabulary. This easy-to-use, topic-based book is an invaluable resource for students and teachers, and is

This new edition of the Collins Pocket English Dictionary provides up-to-date language coverage along with practical guidance on effective English for everyday use. The text is compiled using the late

Collins Easy Learning English Vocabulary is designed to help learners of all ages build their vocabulary. This easy-to-use, topic-based book is an invaluable resource for students and teachers, and is

This eighth edition of Collins Spanish Concise Dictionary is designed for students and professionals using Spanish in the course of their work or study. It draws on Collins’ unique databases of Spanis

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Focussing on the most common errors in English, this book is the easiest way to improve your everyday language skills. Using simple explanations and corpus examples, it uses a thematic approach to ste

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Fully revised, this dictionary is the perfect choice for anyone needing a portable up-to-the-date reference, suitable for all travellers to Russia and for business people and students. Designed to giv

An up-to-date dictionary and a user-friendly grammar guide in one handy volume. A clear layout, cultural notes and an easy-to-use, revised grammar section make this the ideal German reference for inte

An up-to-date dictionary and a user-friendly grammar guide in one handy volume. A clear layout, cultural notes and an easy-to-use, revised grammar section make this the ideal Spanish reference for int

An up-to-date dictionary and a user-friendly grammar guide in one handy volume. A clear layout, cultural notes and an easy-to-use, revised grammar section make this the ideal Italian reference for int

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For children aged 7 and over, this dictionary contains up to date coverage of a range of everyday and curriculum vocabulary. It offers additional language tips and carefully selected and annotated ill

This fantastic thesaurus is especially designed for children aged 7 and over (Key Stage 2) and supports today's primary curriculum needs. Clear and accessible, it is an indispensable tool for young wr