several thousand与 several thousands of 的用法

several thousand与 several thousands of 的用法 several thousand 和 several thousands of 的区别及具体用法 是several thousand还是several thousands of ? several thousand还是several thousands of 有没有many thousand,several thousand,和several thousands of several thousands of与thousands of的区别 several thousands of several thousands of与thousands of有什么区别 several many 既可以修饰thousand 又可以修饰 thousands of many thousands of trees 和several hundred students的问题 有several millions of,那么有several thousands thousand 与 thousands of