腹式 ふくしき呼吸 こきゅうでしょう
fukushikikokyūdeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 腹式呼吸

1. Diaphragmatic breathing, probably.; It's likely diaphragmatic breathing.

Polite
Presumptive
Conjecture