Clusters
n. 群集；簇；丛（cluster的复数形式）
🗣️ 情景例句
She makes a good living as an author.
她靠当作家过着优裕的生活。
Mr. Jones is the author of the controversial book.
琼斯先生写出了一本有争议的书。
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。