That said , sleep research ? less than a century old as a focused field of scientific inquiry ? has generated enough insights for investigators to at least make reasonable proposals about the function of the somnolent state that consumes one third of our lives 雖然如此,這個(gè)成為科學(xué)探索的領(lǐng)域還不到一個(gè)世紀(jì)的睡眠研究,已經(jīng)讓研究人員有足夠的理解,起碼可以對(duì)這個(gè)占據(jù)了人生三分之一時(shí)間的睡眠期,提出合理的功能假說。