In order to study and analyze the species and bacteriorhodopsin (BR) protein resource, a strain of extremely halophilic archaea AB3 was isolated.
为了研究分析嗜盐古生菌物种与细菌视紫红质(BR)蛋白基因资源，分离纯化得到极端嗜盐古生菌ab3。
The third great domain of life, the archaea, look, under a microscope, like bacteria.
第三大“域”是古菌域，在显微镜下察看时，古菌看起来像细菌。
As to importance, when originally identified as distinct, the archaea, too, were regarded as marginal-yet their methane-generating properties are now a factor in climate-change calculations.
至于其重要性，古菌群在最开始被认定为自成一类时，也被视为无关紧要——但是它们释放甲烷的特性现在已被纳入气候变化的考察因素。
Recently, living cells - many of which are Archaea from the Pyrococcus and Thermococcus genera - were found in a mud core taken from 1.6 km below the sea floor off the coast of Newfoundland.
最近，纽芬兰岛海岸的海床之下1.6千米深处取出的砂心泥中，发现了活着的细胞，其中很多是热球菌纲火球菌属的古菌。
Perhaps Archaea has been relegated to its seemingly second-class status because it is a relatively recent discovery—the separate domain was first proposed in 1977.
古生菌被归为不太重要的二等类别，或许是因为它是新近才被发现的——首次提议将古生菌作为单独的类别是在1977年。
Methane-producing archaea (methanogens) are a type of chemolithotroph that can use carbon dioxide and hydrogen to make methane without ever seeing the sun.
产甲烷古菌（methanogens）是一种化能自养生物，它能利用二氧化碳和氢合成甲烷，而不需要太阳参与。
But while bacteria reproduce rapidly, the Archaea population doubles over the course of hundreds, even thousands, of years thanks to a slower metabolism and distinct genetic structure.
尽管细菌繁殖很快，但是由于古生菌新陈代谢较慢，细胞结构截然不同，其数量需要历经几百年甚至几千年的时间才能翻倍。
But while bacteria reproduce rapidly, the Archaea population doubles over the course of hundreds, even thousands, of years thanks to a slower metabolism and distinct genetic structure.
尽管细菌繁殖很快，但是由于古生菌新陈代谢较慢，细胞结构截然不同，其数量需要历经几百年甚至几千年的时间才能翻倍。
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