腸内 ちょうない細菌 さいきん そうでしょう
chōnai saikin sōdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 腸内細菌叢

1. Probably gut microbiota.; Probably intestinal flora.

Polite
Presumptive
Conjecture