いち酸化 さんか炭素 たんそ細菌 さいきんでしょう
ichisanka tanso saikindeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 一酸化炭素細菌

1. Carbon monoxide bacteria, likely.; Possibly carbon monoxide-consuming bacteria.

Polite
Presumptive
Conjecture