either-or
柯林斯詞典
1. ADJ presenting an unavoidable need to choose between two alternatives 非此即彼的
an either-or situation
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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（或衹能）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——今年我們要麼買輛新車，要麼去度假，但衹能做一樣。 返回 either-or