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体得到休息，那么也许是让大脑得以休息？若不是下面两点，这种假使似乎是有道理的。
新概念英语第四册
Lesson 19 The stuff of dreams
📚 句中词汇解析
从本句中提取的重要词汇
n. 问题;疑问;怀疑;议题;
vt. 问（某人）问题;对（某事物）表示[感到]怀疑;
💡 quest寻求，询问+ion名词后缀 → 疑问
"I can't easily give an answer to your question."
你的问题我难以回答。
近义：impugn, interdict, query, challenge, confute, doubt
反义：back, backstop, reinforce, second, support, advocate
adv. 或许;（表示不确定）也许;（用于粗略的估计）或许;（表示勉强同意或其实不赞成）也许;
n. 假定;猜想;未定之事;
💡 per全部+hap机会，运气+s表复数→全是机会→也许，可能
"When you're done, perhaps I can say something."
等你说完，也许我可以说点什么。
近义：maybe, perchance, possibly, probably, haply
反义：indeed, assuredly, absolutely, sure, surely, undoubtedly
adj. 貌似真实的;貌似有理的;花言巧语的;有眉有眼;
💡 plaus鼓掌+ible能...的→能鼓掌通过的→可行的
"Her story sounded perfectly plausible."
她的说辞听起来言之有理。
近义：likely, attainable, possible, verisimilar, believable, colourable
反义：impenetrable, impossible, inaccessible, remote, unachievable, unapproachable
n. 假设，假说;[逻]前提;
💡 hypo下面，次等+thesis论文→还不是正式的理论→假说
"The results confirmed his hypothesis on the use of modal verbs."
结果证实了他的关于情态动词用法的假设.
近义：assumption, postulate, presumption, reasoning, supposition, surmise
n. 身体;尸体;团体;物体;
vt. 赋予形体;
💡 象形: o byd 身体
"They found the body buried beneath a pile of leaves."
他们发现尸体被埋在一堆树叶下面。
近义：object, soma, bodywork, chassis, fuselage, association
反义：lifeblood, atman, psyche, spirit, anima