Descaled
vt. 除去銹皮；除去…的鍋垢；縮小比例
??? 情景例句
Front Desk. Can I help you?
前臺，需要我為您服務(wù)嗎？
When did I say that?
我什么時候說過了？
It is fairly clear that sleeping period must have some function,
很清楚，睡眠必然具有某種作用。