If it is not a question of resting the body, then perhaps it is the brain that needs resting? This might be a plausible hypothesis were it not for two factors.
如果睡眠的功能不是在于使身體得到休息，那么也許是讓大腦得以休息？若不是下面兩點，這種假使似乎是有道理的。
新概念英語第四冊
Lesson 19 The stuff of dreams
?? 句中詞匯解析
從本句中提取的重要詞匯
n. 問題;疑問;懷疑;議題;
vt. 問（某人）問題;對（某事物）表示[感到]懷疑;
?? quest尋求，詢問+ion名詞后綴 → 疑問
"I can't easily give an answer to your question."
你的問題我難以回答。
近義：impugn, interdict, query, challenge, confute, doubt
反義：back, backstop, reinforce, second, support, advocate
adv. 或許;（表示不確定）也許;（用于粗略的估計）或許;（表示勉強同意或其實不贊成）也許;
n. 假定;猜想;未定之事;
?? per全部+hap機會，運氣+s表復數→全是機會→也許，可能
"When you're done, perhaps I can say something."
等你說完，也許我可以說點什么。
近義：maybe, perchance, possibly, probably, haply
反義：indeed, assuredly, absolutely, sure, surely, undoubtedly
adj. 貌似真實的;貌似有理的;花言巧語的;有眉有眼;
?? plaus鼓掌+ible能...的→能鼓掌通過的→可行的
"Her story sounded perfectly plausible."
她的說辭聽起來言之有理。
近義：likely, attainable, possible, verisimilar, believable, colourable
反義：impenetrable, impossible, inaccessible, remote, unachievable, unapproachable
n. 假設，假說;[邏]前提;
?? hypo下面，次等+thesis論文→還不是正式的理論→假說
"The results confirmed his hypothesis on the use of modal verbs."
結果證實了他的關于情態動詞用法的假設.
近義：assumption, postulate, presumption, reasoning, supposition, surmise
n. 身體;尸體;團體;物體;
vt. 賦予形體;
?? 象形: o byd 身體
"They found the body buried beneath a pile of leaves."
他們發現尸體被埋在一堆樹葉下面。
近義：object, soma, bodywork, chassis, fuselage, association
反義：lifeblood, atman, psyche, spirit, anima