ns
abbr. 毫微秒（nanosecond）；未规定（not specified）
例句
There was cis-trans isomerism on the system of SSBR/S/NS and the degree of cis-trans isomerism.
SSBR/S/NS 体系存在顺反异构现象，顺反异构程度也存在。
Technique Time (ns).
技术时间(单位：纳秒)。
The header and NS (name server) records are as before.
头和NS(名称服务器)记录与前面相同。
