unexcited

There are several ways to separate excited from unexcited molecules, thus harvesting the desired isotope.

目前有几种方法可以把受激发分子同未受激发分子分离开, 这样,就可以大量得到我们所需要的同位素了.

——英汉非文学 - 科技

He was still unexcited.

他仍然不激动.

互联网