unfound

例句：

1. 1. The lost treasure was never found by the archaeologists.
   考古队从未找到那件失窃的宝藏。
2. 2.The scientist has unfound evidence to support his theory.
   这位科学家有未被发现的证据来支持他的理论。
3. 3. The team searched for hours but found nothing.
   团队搜索了几个小时，但什么也没找到。