时间“年”“天”用法辨析

Differentiation Analysis on Usage of “year” and “day”

针对科技论文中如何正确判断"年"、"天"是否为时间单位的问题,通过实例对科技论文中如何正确使用时间"年"、"天"进行了详细分析,指出"年"、"天"用于计量时,为时间单位,应用单位符号a、d;而用于表示时序、计数、习惯时间及特定的时间段等情况时,"年"、"天"并不是表达精确的时间长度,不是时间单位,不能使用单位符号,应使用汉字"年"、"天"。

Aiming at the problem of how to precisely judge the ＂year＂ and ＂day＂ being time unit or not in scientific papers,the usage of ＂year＂ and ＂day＂ were analyzed in detail.It is pointed out that when ＂year＂ and ＂day＂ are used to be time measure unit,they should be expressed as unit symbols,i.e.a and d,respectively;when they indicate time series,counting number,habit time,and a period of time,et al,＂year＂ and ＂day＂ are not expression of a specific time,they should be Chinese characters ＂year＂ and ＂day＂ used rather than unit symbols.