英语翻译

问题描述:

英语翻译
Look up International Morse Code (IMC) and then provide an upper bound as to the number of characters that can be represented with this scheme.What is the ratio of used to unused characters in IMC?

检索国际摩斯码,然后提供能用该组合表示的(摩斯)码数量的最大值.求出国际摩斯码中用到的码与没有用到的码的比值