这些新型反应堆的设计更安全高效。

The new ___reactors are designed to be safer and more efficient.

这些核反应堆被用来生产医用同位素。

These nuclear ___reactors are used to produce medical isotopes.

他是个情绪化的反应者，对任何批评都很敏感。

He is an emotional ___reactor, sensitive to any criticism.