我国的法定计量单位是以国际单位制(SI)为基础的。采用法定计量是科技期刊必须执行的原则,同时也是衡量期刊质量的一项标准,但在法定计量单位的普及过程中难免出现种种困难。有些读者对某些旧制单位,如亩的使用已习惯,难以接受平方百米,即hm~2这一计量单位,或者对本刊中所使用的某些其它符号不甚了解。为加强本刊与作者 Our country’s legal unit of measure is based on the International System of Units (SI). The use of statutory measurement is the principle that sci-tech periodicals must implement, and it is also a standard to measure the quality of periodicals. However, difficulties are inevitable in the popularization of statutory units of measurement. Some readers have become accustomed to the use of certain old units, such as mu, and are hard-pressed to accept the unit of measure of 100 square meters, hm ~ 2, or have little understanding of some of the other symbols used in this publication. To strengthen the publication and author