| 1. | The archaea contain many organisms of extreme environments , such as hydrothermal vents , hot springs , saline sediments , volcanic craters and boiling muds . they include methane - generating organ - isms ( methanogens ) , sulfate reducers , and extremophiles
古细菌包括许多生长在极端环境中的有机体，如高热温泉口，高盐沉积地区，火山喷发处，沸腾的岩浆中等的生物有机体，还包括产甲烷菌等。 |
