单词：sigma
音标：['si^mә] ；
[计] 求和
[医] σ(希腊文第十八个字母)
[医] σ(希腊文第十八个字母)
n. the 18th letter of the Greek alphabet
词型变化：名词复数形式 : sigmas
词性分布：
sigma的用法和样例：
例句
用作名词(n.)
- Summations are almost invariably indicated ellipses instead of the more prevalent sigma notation.在表示“连加”的式子中，几乎一成不变地使用省略号来代替更为流行的“∑”符号。
词汇搭配
- sigma particle∑粒子
- sigma phase西格玛相,相...
- sigma factor务马因子,西格玛因子...
- delta sigma modulation增量总和调制...
- sigma reaction西格马反应
- sigma storage求和存储器
- sigma hardness tester西格马测试硬度计...
- three-sigma limit[计] 三界限
- sigma memory求和存储器
- sigma formation形成相
单词：sigma 相关文章
Thank you very much 非常感谢 First of all, thank you 首先 谢谢你们 I thank you and Dr. Paula WhetselRibeau 谢谢你们 还有宝拉?威索尔里博博士 Thank you for meeting me outside with your daughter 谢谢你带着你女儿在外面接
发表于:2018-12-30 / 阅读(248) / 评论(0)
公众人物毕业演讲
公众人物毕业演讲
If, as it now seems, every single galaxy has a black hole at its heart, this can't be a coincidence. Perhaps black holes are an essential part of what galaxies are and how they work. No one had expect
发表于:2019-01-02 / 阅读(556) / 评论(0)
超大质量黑洞
超大质量黑洞
This Business English Podcast lesson is the first in a series of shows that will follow an employee of a manufacturing company on a training trip to the U.S. Over the series, well practice many situations that will be useful for you on your business
发表于:2019-01-18 / 阅读(232) / 评论(0)
原汁原味商务英语播客
原汁原味商务英语播客