熱水 ねっすい噴出 ふんしゅつ こうでしょう
ne' suifun shu tsukōdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 熱水噴出孔

1. Probably a hot spring vent.; Possibly a hot water vent.

Polite
Presumptive
Conjecture