难怪他们说我很幸运难怪她们说我很幸福
[nán guài tā men shuō wŏ hĕn xìng yùn nán guài tā men shuō wŏ hĕn xìng fú]
The phrase expresses a mixture of surprise and contentment with one's current situation. The person feels fortunate or satisfied with their life, echoing others' observations that they lead an easy and blissful life. The redundancy in 'they' vs. 'they(she)' might emphasize the broad acceptance by different groups.