单词：unbiased estimate
unbiased estimate的用法和样例：
例句
- Futures price is the unbiased estimate of expected spot price, which is based on the function of risk transferring.期货价格是未来现货价格的无偏估计，这是建立在风险转移功能基础之上的。
- Unbiased estimators are not necessarily consistent, but those whose variances shrink to zero as the sample size grows are consistent.无偏估计量未必是一致的，但是那些当样本容量增大时方差会收缩到零的无偏估计量是一致的。
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