null ①零，零的 ②无效的，无价值的 ③类光[的]†
null 零的；零
数据库 数据库管理系统及其实现技术 释文 null 空值
- Loudi Shi
- loudness
- loudness contour
- loudness discrimination
- loudness level
- loudness model
- Loudon
- Loudong school of painting
- loudspeaker
- loudspeaker array
- loudspeakers
- loudspeaker system
- Loufan Xian
- Lougang irrigation and drainage system in Taihu basin
- lougu
- Lou Guan
- Lou Guangda
- Louguan sect of Taoism
- Louguantai Ginkgo in Zhouzhi
- Louguantai National Forest Park
- Louguantai Taoist Temple
- Lou Harrison
- Louisa May Alcott
- Louis Antoine de Poirot
- Louis Armstrong