无独有偶的英文：
[Literal Meaning]
no/single/have/double
not to come singly, but in pairs

[解释]
独：一个；偶：一对。不只有一个，还有另外一个。

[Explanation]
coincidentally

[例子]
无独有偶，昨天他也去全聚德吃烤鸭了。

[Example]
Coincidentally, he went to have the Beijing Roast Duck in Quanjude yesterday.

[英文等价词]
It never rains but it pours.
not come singly but in pairs