1. Archaebacteria are a type of microorganism that can live in extreme environments, such as hot springs and deep-sea hydrothermal vents.
古菌是一种可以生活在极端环境中的微生物，比如温泉和深海热液喷口。
2. Scientists study archaebacteria to gain insights into the origins of life on Earth and the possibility of life on other planets.
科学家研究古菌以了解地球上生命的起源以及其他星球上存在生命的可能性。
