未发现的

例句：

1. 1. The team's performance was a surprise to many, as they had been undiscovered in the past.
   这个团队的表现让很多人感到惊讶，因为他们在过去一直默默无闻。
2. 2.The scientist discovered a new species of bird that had never been undiscovered before.
   这位科学家发现了一种之前从未被发现的新鸟类物种。
3. 3. The undiscovered island is said to be home to some of the most beautiful coral reefs in the world.
   据说这个未被发现的岛屿是世界上一些最美丽的珊瑚礁的所在地。