“need hierarchy”概念、定义、翻译-科学时代

单词	need hierarchy
释义	市场营销词汇手册 need hierarchy 需求层次
随便看	video recorder video recorder video recorder video recording video-recording art video refresh video scan videoscanning video sender video server video server video sign video signal video signal video signal video signal video signal video signal coding video subsystem video switcher video switching videotape videotape videotape videotape

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

need hierarchy