Retroreflective
a. [物]回射的,反向反射器的
🗣️ 情景例句
Good.
好。
May I use your telephone?
我可以用你的电话吗？
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。