tens of thousands of 是固定词组么?

tens of thousands of 是固定词组么? tens of thousands tens Tens of thousands of tens of thousands tens and thousands of 关于tens of thousands of之类的词组 tens of thousands of people a couple tens of thousands Tens of thousands of school children是什么意思? tens of thousands of student是什么意思? 请问tens of thousands of tourists是什么意思? tens of thousands of people 如何翻译.