柯林斯詞典either-or 1. ADJ presenting an unavoidable need to choose between two alternatives 非此即彼的 an either-or situation 返回 either-or劍橋詞典used to refer to a situation in which there is a choice between two different plans of action , but both together are not possible 必須（或只能）兩者擇一的；非此即彼的 It's an either-or situation - we can buy a new car this year or we can go on holiday , but we can't do both. 這就叫魚和熊掌不可兼得——今年我們要么買輛新車，要么去度假，但只能做一樣。 返回 either-or