say 類似于speak.
volume此處指：大量,多量
參考：
speak volumes (for sth) (對(duì)…) 有重大的意義; 能充分地證明; 充分地表現(xiàn)
Her smile spoke volumes.
她的微笑深具意義
His consent to your proposal speaks volumes for his
good will.
他贊成你的提議充分證明他的友善答得已經(jīng)非常好了，不過(guò)我還想追問(wèn)一下原句怎么翻譯，多謝！
says volumes regarding the quality of your air from precise sized bubbles.
這個(gè)是關(guān)于發(fā)泡混凝土技術(shù)的