·2,447,543篇论文数据，部分数据来源于NoteExpress
The condition, which they imposed on the distribution of the regressor variable X in their construction of the estimators, is very restrictive.
但在把他们的估计中，对自变量的分布加上了很强的限制性条件。
youdao
应用推荐
模块上移
模块下移
不移动