accidental circumstance

例句：

1. 1.The accidental discovery of a rare plant led to an exciting journey.
   偶然发现一种罕见的植物，引发了一段激动人心的旅程。
2. 2.She was surprised by the accidental meeting with her old friend.
   她对意外遇见老朋友感到惊讶。
3. 3. The accidental slip on the wet floor caused her to trip and fall.
   在湿滑的地板上不小心滑倒，让她摔了一跤。