[N-UNCOUNT 不可数名词]水银;汞Mercury is a silver-coloured liquid metal that is used especially in thermometers and barometers.
Oxford
mer·cury/ˈmɜːkjəri; NAmEˈmɜːrkjəri/noun[uncountable ](symb.Hg )a chemical element. Mercuryis a poisonous silver liquid metal, used in thermometers.汞;水银mer·cury/ˈmɜːkjəri; NAmEˈmɜːrkjəri/Mer·cury/ˈmɜːkjəri; NAmEˈmɜːrkjəri/nounthe smallest planet in the solar system,nearest to the sun 水星Mer·cury/ˈmɜːkjəri; NAmEˈmɜːrkjəri/