There were hundreds of people there.其中hundreds of 新概念英语发生连读时

There were hundreds of people there.其中hundreds of 新概念英语发生连读时,of貌似读不出吗?
hundreds of 按照逐句读是容易,但是连读起来比较困难.那是为什么呢?有没有hundred sof 这样的连读法呢?（dozens of ,thousands of ,millions of)主要是读法?