- serendipitous
- 偶然: accidental; fortuitous; casu ...
- 发现: find; discover
- 的: 4次方是 The fourth power of 2 i ...
- 偶然发现: accidental discovery; accidental observation; chance on; fortune; happen upon; hit on; hit upon; stumble across; stumble upon
- 巧遇;偶然发现: happen on
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