the 18th letter of the Greek alphabet (Σ, σ, or at the end of a word ς), equivalent to and transliterated as roman s
in mathematics, the symbol (Σ), usu denoting a summation
[Greek sigma, of Semitic origin]
| 单词 | sigma |
| 释义 | sigma |
| 随便看 |
英语词典包含66266条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。