Leadtime
n. 投产准备阶段；超前时间
🗣️ 情景例句
How good is your English?
你英语有多好？
I'm boating at the lake.
我在湖边划船。
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。