adj.偶然的，偶然发生的;有意外收获的

It was a serendipitous discovery that led to the invention of Penicillin.
这是一个偶然的发现，导致了青霉素的发明。
I found my long-lost wallet in the most unexpected place - a library book return slot.
我在最意想不到的地方——图书馆的还书口找到了我丢失已久的钱包。
The meeting between the two scientists was serendipitous, as they discovered a shared interest in renewable energy.
两位科学家的相遇纯属巧合，因为他们发现对可再生能源有着共同的兴趣。
She stumbled upon a serendipitous solution to her problem while browsing through an old cookbook.
她在翻阅一本旧食谱时，意外地找到了解决问题的方法。
The couple's chance encounter on a train ride turned out to be the beginning of a beautiful love story.
他们在火车上的邂逅竟是美丽爱情故事的开端，这真是机缘巧合。
His serendipitous visit to the local museum sparked his passion for art history.
他偶然参观当地博物馆的经历激发了他对艺术史的热情。
A serendipitous mix-up in the mail led to a box of forgotten childhood treasures arriving at her doorstep.
一封邮件的误投让她收到了一箱被遗忘的童年珍宝，这真是惊喜。
The musician's accidental performance at a small café turned into a career-defining moment.
这位音乐家在一家小咖啡馆的即兴表演，竟成为他事业转折的关键时刻。
She found her lifelong partner in a serendipitous moment during a charity event.
在一次慈善活动中，她意外地遇到了她一生的伴侣。
The inventor's serendipitous experiment led to the creation of a revolutionary product.
这位发明家的一次偶然实验促成了一个革命性产品的诞生。