“navigation aids”的概念、定义、翻译、参考文献-科学参考

单词	navigation aids
释义	navigation aids Encyclopedia 工学水上安全保障释 navigation aids航标设置于海上、海岸或江河的易见处，以特定的标志、灯光、音响或无线电信号，用以帮助船舶定位、引导船舶航行、表示警告和指示碍航物的人工标志。全称助航标志。
随便看	police criminal law enforcement police crisis negotiation police cryptography police devices police dog police dog appliying technnology police dog's technology Police Education and Training police education and training police emotion management police epaulets police equipment Police Equipment Design Committee of Ministry of Public Security police external supervision police force composition at crime scene police force dispatch police geographic information platform police guarantee culture police image and discipline police implements police impression management police inspection police inspector police instruction and communication equipment police integrated information system

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。