1 N-UNCOUNT 最低点;最低水平;低谷 If something has reached rock bottom, it is at such a low level that it cannot go any lower. 最低点;最低水平;低谷
2 N-UNCOUNT 非常糟糕的状态;极度沮丧的处境;低谷 If someone has reached rock bottom, they are in such a bad state or are so completely depressed that their situation could not get any worse. 非常糟糕的状态;极度沮丧的处境;低谷
3 ADJ [usually ADJ n] (价格、水平)极低的,非常低的 A rock-bottom price or level is a very low one, mainly in advertisements. (价格、水平)极低的,非常低的 [approval]
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