“sign-alternating”的概念、定义、翻译、参考文献-科学参考

单词	sign-alternating
释义	sign-alternating 变符正负号交变
随便看	presetting circuit presetting machine presetting mechanism presetting period(混凝土) presetting system presettling preset tool preset torque-wrench preset tuning preset type switcher preset value preset velocity preset yield load preshaping presharpen technique preshaving preshaving cutter (齿轮) preshaving hob preshaving pinion cutter presheaf presheaf of regular functions preshearing pre-shipment financing pre-shipment quality terms preshock noise test

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。