adj.不起反应的
Elemental nitrogen is a very unreactive and inert material. 元素氮是一个十分不活跃的惰性物质。
The material is unreactive chemicals and thus does not radiate much radiation. 该材料是非活泼化学物，因此并没有辐射。
One of the noble gases, neon is colorless, odorless, tasteless, and completely unreactive. 氖是稀有气体的一种，无色、无臭、无味，完全不起化学反应。
The heaviest noble gas, it is colourless, odourless, tasteless, radioactive, and almost completely unreactive (forming compounds only with fluorine). 氡是最重的稀有气体,无色,无臭,无味,有放射性,相对不活泼(只与氟组成化合物)。
The first concerns noble gases.Were it not for escape, chemically unreactive gases such as neon or argon would remain in an atmosphere indefinitely. 第一个线索与惰性气体有关，氖或氩这类的惰性气体不会散逸也不会进行化学反应，会长久存在大气中。
