hundred, thousand, million等词前面与具体数字/several和不具体数字修饰时的不同情况.

问题描述:

hundred, thousand, million等词前面与具体数字/several和不具体数字修饰时的不同情况.
hundred, thousand, million等词前面有具体数字或several修饰时,不加-s,不与of 连接,如是many等不具体数字就加-s,与of 连接,对吗?

you are correct
several million
eight millions
specific number...