Tens of thousands 什么表达方法?

Tens of thousands 什么表达方法? tens of thousands tens Tens of thousands of tens of thousands tens and thousands of 请问：tens of thousands students 这个表达对吗? thousands and thousands of,tens and thousands of分别译成什么 tens of thousands of people a couple tens of thousands tens of thousands和tens of millions 的意思 Tens of thousands of school children是什么意思? tens of thousands of student是什么意思?