thousand 与 thousands of 区别急例如；200（ ）people

a thousand ,thousands of ,thousand of 和thousands and thousands of 的区别与用法 thousands of 与thousand 的区别? thousand 、thousands、thousands of区别 thousand 与 thousands of 区别急例如；200（ ）people several thousand与 several thousands of 的用法 many thousand books 与 many thousands of books哪个对 thousands of.与thousand of的区别,举例说明. many thousand ,many thousand of 与 many thousands of 的区别是什么? 有thousand of这个词组吗?我就是说的THOUSAND OF 与 THOUSANDS OF thousand thousands thousand of thousands of 什么区别 thousand,thousands,thousand of,thousands of的区别 关于thousand、thousands、thousand of、thousands of应该怎么用? many thousands of 与many thousand哪个对?字典上既有several thousands of 又有several thousand的表达方式,难道many就不行吗? thousand of 与 thousands of的区别什么时候用thousand of 什么时候用thousands of ?我头都大了不知道不要瞎说，要不我头又大了！~~ thousand ,thousands,one thousand ,thousand of,thousands of这些都有什么区别 Many _____ trees A thousand B thousands C thousands of two thousand of 和thousands of 区别 thousand 与 thousands of It cost me several ______ money.A.thousandB.thousands of 在网上查专业的~但都好矛盾~有歧义~