柯林斯英汉双解大词典
xi /zaɪ, saɪ, ksaɪ, ksiː/
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1.
N the 14th letter in the Greek alphabet (Ξ, ξ), a composite consonant, transliterated as x 希腊字母表中第十四个字母，译后写作x。
双语例句原声例句权威例句
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We then fly to the historic city of Xi' an for two nights' stay.
之后我们坐飞机去古城西安待两个晚上。
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The Shenzhou XI spaceship returned to the Earth successfully.
神舟十一号飞船成功返回地球。
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Suppose someone has been investing money for n years and xi is the return on the investment in a given year.
假设有人投资了n年,Xi是第i年的收益率
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If you have a sample with n observations, it's the summation I = 1 to n of xi/n--that's the average.
如果你有n个观测值,对Xi从i=1到n求和再除以n
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