谢谢大家，很有帮助！

Strictly speaking, "-" is a hyphen (dashes are longer). Hyphens are used to join words or separate syllables of the same word (eg. when a word spills from one line to the next in a paragraph). They are also used in a number series (eg. phone number, serial number) or as part of a code. When reading the code aloud, though, many people say "dash" instead of "hyphen", so both would be commonly understood, even though "hyphen" is more correct. Dashes are longer in length and have a different usage (as only one example, referring to a span of years like "1799–1802", you would use a dash). Unless you are a typesetter or grammar expert though most people would probably not distinguish between the two when just reading a code or number aloud that included a hyphen.

Stinking Stinky tofu

Many foreigners don't like the smell of stinking stinky tofu because it's very stinking stinky.
But I love it very much. It's one of the famous snacks in Taiwan. I eat it at least twice a week.

[It's not best to begin a sentence with "But", but in informal writing or chat it is not uncommon. You could say "That said, I love it very much" instead. You could also combine it with the prior sentence: "Many foreigners. . . stinky, but I love it very much."]