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Some essentialities in operation and maintenance of high speed trains are discussed.
论述了高速列车在运用检修中的若干个基本问题.
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There are many factors influencing spontaneous combustion in goaf and their relative essentialities are different.
采空区自然发火的影响因素很多,各因素之间的相对重要性不同.
英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。