2N-VAR [with supplement, oft num N, Nof num, NOUN num]星等(指星的亮度);震级;(爆炸的)强度Magnitude is used in stating the size or extent of something such as a star, earthquake, or explosion. 星等(指星的亮度);震级;(爆炸的)强度 [technical]
...the 1.2 magnitude star Fomalhaut.
星等为1.2 的北落师门星
The San Francisco earthquake of 1906 had a magnitude of 8.3.
1906年旧金山地震的震级为8.3级。
3PHRASE 程度;重要性 You can use order of magnitude when you are giving an approximate idea of the amount or importance of something. 程度;重要性
America and Russia do not face a problem of the same order of magnitude as Japan.
美俄两国所面临问题的重要性与日本的不可同日而语。
4PHRASE 数量级 In mathematics, if one amount is an order of magnitude larger than another, it is ten times larger than the other. If it is two orders of magnitude larger, it is a hundred times larger. 数量级
The time delay would be smaller by eight orders of magnitude.