In the 16th century, before the term mandarin became widespread in the European languages, the word Loutea (with various spelling variations) was often used in Europeans' travel reports to refer to Chinese scholar-officials.
Why do some people get smelly gas after eating eggs? I really love eggs, but I get really bad, sulfurous and rotten egg-smelling gas after eating eggs. This doesn't happen when I eat foods which contain eggs in moderate amounts (cakes, etc), but it does happen when I eat hard-boiled eggs or fried eggs. I don't get any stomach cramps or any other symptoms of allergy, however.
The component of natural gas that makes it dangerous is methane, which is extremely flammable. A natural gas leak can cause a fire or an explosion. It's not easy to detect a natural gas leak because methane, and the carbon monoxide that it releases, is odorless, tasteless and colorless. Many gas companies add mercapton or some other sulfide-based substance to natural gas. This is what gives it that rotten egg smell and makes leaks easier to detect.