What does she mean by HH?

她说“HH”意思？

This massive star called HH 1177 is in a galaxy called Large Magellanic Cloud.

这颗名为HH 1177的大质量恒位于大麦哲伦云中。

Mexico already has enough question marks, and HH joins the mix as another one of those.

对于墨西哥来说已问号，而埃克托·埃雷拉就其中的一个。

The other way is to pronounce it, I think is more old-fashioned, with a: hh-- hh-- hh-- sound before.

另一种读法， 我觉得比较老套，前面带一个：hh-- hh-- hh--音。

The 5 out of 10. And what's that rating scale on because I don't know what HH is.

满分 10 分，打 5 分。这个评分标准多少，因为我不知道 HH 。

WH- words can be pronounced with a " hh" sound before the W. It's not necessary, and it's not my preference.

WH-单词可以在W前发“hh”音，没必要，我也不喜欢。