我认为这是首次有人证明细菌细胞实际上能够感知有气味的气体，比如说想氨气。

I think it's the first time someone has shown that bacterial cells can actually sense odorous gases like ammonia.

youdao

生命生产出甲烷、氨气、氧气、氢气、二氧化碳以及其他气体。

Life generates methane, ammonia, oxygen, hydrogen, carbon dioxide, and many other gases.

youdao

通常情况下，同猪和牛相比，每单位体重或增加每单位体重，昆虫产生更少的甲烷、一氧化氮和氨气。

The insects generally produced less methane, nitrous oxide and ammonia both per unit of body mass and per unit of mass gained than pigs or cattle.

youdao

It doesn't go all the way to absolutely 100 percent ammoniazero hydrogen zero nitrogen if they were mixed together with the right ratios.

即使按适当比例混合,也不会出现全部氨气,没有氢气和氮气的情况。

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