物理量及其单位如用国际符号表示时,其国际符号字母书写是用正体字还是斜体字,是用大写体还是小写体是有规定的。随便写,不仅不规范,而且容易出差错,初涉教坛的教者和初学者都要注意这个问题。 If the physical quantities and their units are expressed in international symbols, whether their international symbols are written in normal or italic letters or whether they are in uppercase or lowercase is required. Just write, not only non-standard, but also easy to make mistakes, the initial involvement of religious teachers and beginners should pay attention to this issue.