Sidereal day
n. 恒星日（较标准日约短四分钟）
🧩 词语组成解析
sidereal
[saɪ'dɪrɪəl]
adj. 星的，根据恒星测定的;
day
[de]
n. 一天;白天;时期;节日;
adj. 日间的;逐日的;
adv. 每天;经常在白天地;
🗣️ 情景例句
I am planning to write an editorial that I think will help you.
我计划写一篇社论， 我认为应该能帮助你们。
It is harder to marry a daughter well than to bring her up well.
养女容易嫁女难。
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。