“off-hook service”的概念、定义、翻译、参考文献-科学参考

单词	off-hook service
释义	off-hook service [`ȯf ´hu̇k ´sǝr·vǝs] ^{COMMUNICATIONS} Priority telephone service for key personnel that affords a connection from caller to receiver by the simple expedient of removing the phone from its cradle or hook.
随便看	variational inequality variational method variational principle variation diagram variation of latitude variation per day variation per hour variation per minute varicap varicella varicocele varicose varicose vein varicosity variegate variegated position effect variety varifocal lens Varignon's theorem varindor variocoupler variograph variola variole variolitic

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。