hundreds of thousands of 与 tens of thousands of的区别

A)hundreds of thousands of 指的并不是确切的数字 而是一个很大的数字概念 所以翻译为无数的,几十万的...例句：
hundreds of thousands of children are starving.无数的儿童在挨饿.
B）tens of thousands of的意思是成千上万 也是一个概念 但是没有第一个这么恐怖
tens of thousands of students are going to take the National College Entrance Examination this year.今年有成千上万的学生参加高考.