The bacteriacolony has been isolated there for about 1.5 million years, researchers say, ever since the glacier rolled over the lake and created a cold, dark, oxygen-poor ecosystem.
The U.S. bacterial limit is no more than 500 colony-forming units of bacteria per milliliter of water.
美国的细菌数量上限是每毫升水不超过500个菌落形成单位。
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Last year, researchers engineered an entire colony of bacteria to periodically fluoresce in unison, and we can expect many more papers exploring the behaviour of collections of cells.