“river sand-mining planning”的概念、定义、翻译、参考文献-科学参考

单词	river sand-mining planning
释义	river sand-mining planning Encyclopedia 工学〔专项水利规划〕释 river sand-mining planning河道采砂规划为限制滥采乱挖砂石，使河道砂石资源得到科学合理的利用，保障防洪安全、通航安全、供水安全和基础设施安全，指导采砂活动科学、可控、有序地开展而制定的总体安排。
随便看	positive chain complex positive channel metal-oxide-semiconductor circuit positive channel metal-oxide-semiconductor integrated circuit positive charge positive closure positive clutch positive column positive complex positive component positive cone positive contrast positive contribution positive contribution Monte Carlo method positive control positive correlation positive crystal positive current positive curvature positive curvature manifold positive cycle positive definite positive definite bi linear form positive definite bi-linear form positive definite closed form positive definite form

科学参考收录了854744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。