adj.

(of sewage) treated with aeration and bacteria to aid decomposition

(of e.g. a molecule) made reactive or more reactive

同義詞：excited

rendered active; e.g. rendered radioactive or luminescent or photosensitive or conductive

set up and placed on active assignment

"a newly activated unit"

1. The alarm system is activated by motion.
   報警系統(tǒng)通過運動被激活。
2. Once the enzymes are activated, the reaction speeds up.
   一旦酶被激活，反應就會加速。