lr

abbr. 实验室反应堆(laboratory Reactor)
abbr. 实验室试剂(Laboratory Reagent)
abbr. 实验室报告(Laboratory Report)
abbr. 大圆环(large ring)

详细释义:

abbr.

1. =letter report 书面报告

2. =long range 远距离, 远程; 长期