Other ancient bacteria consumed methane, greatly reducing its amount in the atmosphere.

其他古代细菌消耗甲烷，大大减少了甲烷在大气中的含量。

youdao

Ancient people around the world used different ways to kill the bacteria in the water.

世界各地的古人们用不同的方法杀死水里的细菌。

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But there was still a very different physiological challenge for these organisms than for the more evolutionarily ancient single-celled organisms such as bacteria.

然而与进化上更古老的单细胞生物如细菌相比这些多细胞生命面临着一个非常不同的生理挑战。

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Initially she inserted the gene using bacteria, but then her colleagues managed to breed the ancient rice with modern varieties using genetics-assisted breeding technologies, which transferred the flood-resistance gene and not much else.

FORBES: Green Genes

Autophagy is an ancient mechanism, shared by all eukaryotic organisms (those which, unlike bacteria, keep their DNA in a membrane-bound nucleus within their cells).

ECONOMIST: Exercise and longevity

They used new techniques that can identify ancient genetic information from an archaeological find, even when large amounts of DNA from soil bacteria are also present.

BBC: Fossil human traces line to modern Asians