several millions of several millions 哪个是正确表达法

several millions of several millions 哪个是正确表达法 several millions of several million of 和several millions of 具体是several millions of students还是several million students several millions of 还是several million 有several millions of,那么有several thousands several million people还是several millions of people问什么 是several millions of the students还是several million of the st 有several millions 有several thousands Many millions of people与Several millions of people意思一样吗 several thousands of millions of year后面year为什么用单 millions of millions