这个太空站的生命维持系统利用再生装置将废气转化为可呼吸的氧气。

The space station's life support system uses a ___regenerator to convert waste gases into breathable oxygen.

这种新型药物被发现是一种有效的心脏组织再生剂。

This new drug was found to be an effective ___regenerator for heart tissue.

这位年轻教师就像一股新生力量，为沉闷的课堂注入了活力。

The young teacher served as a ___regenerator, bringing new energy to the dull classroom.