当运用量纲一的量和单位 1进行计算时 ,有如下问题要引起注意 :( 1 )有些量纲一的量 ,其单位 1另有专门的名称 ,究竟是用还是不用这些专门的名称。视具体情况而定。新标准列举出如下例子 :平面角 θ=0 .5rad=0 .5;立体角 Ω=2 .3sr=2 .3;场量级 LF=1 2 Np=1 2。( 2 )其他单位可 There are several issues to be aware of when using the quantity one by one and the quantity one by one: (1) There is some dimension-by-quantity, and the unit 1 has a different name, whether it is used or not. As the case may be. The new standard enumerates the following examples: Plane angle θ = 0 .5 rad = 0 .5; Stereo angle Ω = 2 .3 sr = 2 .3; Field magnitude LF = 1 2 Np = 1 2. (2) other units can be