What it is
事情真相,原因,原委,理由
🧩 词语组成解析
what
[wɑt]
pron. （用以询问某人或某事物的词）什么，多少;…的事物;
adj. …的（事物或人）;
adv. （用于感叹句中）;
int. （用以表示不相信或惊奇）;（用以表示未听清楚对方说的话）;
it
[ɪt]
pron. 它;他;正好是所需的;事实[情况];
n. <美俚>傻瓜，笨蛋;<俚>绝妙的人;理想的东西;登峰造极;
is
[ɪz]
vt.& vi. 是（be的三单形式;
n. 存在;
🗣️ 情景例句
It sounded like a dog barking.
听起来像狗叫。
The post office is in the middle of the block, You can't miss it.
那邮局就在街区的中间，很好找。
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。