释义 |
SI /ˌes ˈaɪ/ abbreviation International System (used to describe units of measurement)国际单位制◆SI units such as the metre, the kilogramme and the second诸如米、千克和秒等国际单位ⓘ SI are the first letters of the French phrase Système International.SI 是法语 Système International 的首字母缩写。 |