activate
/ˈæktɪveɪt; `æktəˌvet/ v [Tn] 1 make (sth) active 使（某事物）活动: The burglar alarm was activated by mistake. 防盗铃误响了. 2 (physics 物) make (sth) radioactive 使（某物）产生放射性. 3 (chemistry 化) make (a reaction) happen more quickly, eg by heat 使（反应）加快（如藉加热）; 使活化.
