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 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