“伏尔坎”这个名字被用来给未被发现的星体命名。

The name Vulcan was given to the undiscovered planet.

《柯林斯英汉双解大词典》

在 Juan 的世界里，未知和未被发现的东西是广阔而不可思议的。

In Juan's world, the unknown and undiscovered was vast and marvelous.

youdao

所以那附近可能还存在未被发现的矿藏。

So there may be further undiscovered deposits nearby.

youdao

It says finally it came to place, according to this concocted system, and I've underlined in red, very many undiscovered members.

它说，最终它会找的位置的，根据这个调和的系统，我标了红色的下划线，有很多未被发现的成分。

麻省理工公开课 - 固态化学导论课程节选

and finding the dead bodies that hadn't been found and putting labels on them

就是四处寻找未被发现的尸体，然后在上面贴上标签，

退休的消防员叔叔 - SpeakingMax英语口语达人

And he predicts the density of the oxide of the yet undiscovered element.

他预测这个还未被发现的元素的,氧化物的密度。

麻省理工公开课 - 固态化学导论课程节选