本刊执行GB3100～3102-1993《量和单位》中有关量、单位和符号的规定及其书写规则。注意单位名称与单位符号不可混用。组合单位符号中表示相除的斜线多于1条时应采用负数幂的形式表示,如ng/kg/min时应采用ng·kg~(-1)·min~(-1)或ng/(kg·min)的形式。在叙述中应先列出法定计量单位数值,括号内写旧制单位数值;如果同一计量单位反复出现,可在首次出现时 This issue of GB3100 ~ 3102-1993 “volume and unit” in the amount, unit and symbol of the rules and writing rules. Note that unit name and unit symbols can not be mixed. In the unit of combination sign, more than one slash indicating the division should be expressed in negative power. For example, ng · kg -1 min -1 or ng / (kg · min). In the narrative, the legal unit of measurement should be listed first, and the value of the old unit in brackets. If the same unit of measurement is repeated,