愉悦口语:第505期 唯一英文怎么说

讲解文本：

one and only 惟一的，仅有的，独一无二的
For several years they've been each other's one and only.
这几年来，他们都是彼此的唯一。
This is my one and only chance to do something.
这是我唯一的机会。

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