连续几小时

several hours in a row

i've waited here for several hours in a row.

但是这样翻译略显生硬，因为当提到“几个小时”a few hours/several hours的时候，一般都是指连续的。所以个人观点，“连续”可不译出。

连续不断

[词典] [法] never dying;

[例句]居民们报告说他们听到了连续不断的枪声。

Residents report that they heard continuous gunfire