test ratio的用法和樣例：
例句
- In one corner, ex-KGB tycoons are finding that slumps are a greater test of business ability than booms.
一方是前克格勃大亨們，他們認為在衰退時(shí)期比經(jīng)濟高速增長(cháng)期更能檢驗出領(lǐng)導人的商業(yè)才能。 - The result of the variance ratio showed that the random walk hypothesis on the wheat futures of ZCE was disproved.
方差比檢驗的研究結果卻表明鄭州小麥期貨市場(chǎng)不滿(mǎn)足有效性假設。
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