1.While not all useful estimators are unbiased , virtually all economists agree that consistency is a minimal requirement for an estimator.
虽然并不是所有的有用的估计量是无偏的，但是，一致性则是经济学家对估计量的最低要求。
2.Language: basic knowledge of English is the minimal requirement.
语言：至少要求具有基本的英语知识。