“top rail”的概念、定义、翻译、参考文献-科学参考

单词	top rail
释义	top rail [`täp ´rāl] ^{BUILDING CONSTRUCTION} The uppermost horizontal member of a unit of framing, such as a door or a sash.
随便看	positive mold positive motion positive movement positive ore positive part positive pedal curve positive phase sequence positive-phase-sequence relay positive pole positive ray positive real function positive semidefinite positive series positive shoreline positive skewness positive temperature coefficient positive terminal positive transfer positive transmission positive with respect to a signed measure positive zero positron positron camera positron depth profiling positron emission

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。