“economical and practical”的概念、定义、翻译、参考文献-科学参考

单词	economical and practical
释义	economical and practical 经济实惠经济实惠
随便看	voiced sound voice-ear test voice-encoded system voice-excited vocoder voice excited vocoder voice filter voice-frequency voice frequency voice frequency binary-code sendind equipment voice frequency carrier voice frequency carrier telegraph voice frequency channel voice frequency circuit voice-frequency circuit voice-frequency circuit-test unit voice-frequency dialing voice-frequency electric waves voice frequency multi-channel carrier telegraphy voice frequency pulsing voice-frequency relay voice frequency repeater voice-frequency repeater voice-frequency ringing voice-frequency sender voice-frequency signalling

科学参考收录了1248194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。