v.  激活，使活动；使活化

• activation   n.  [电子][物] 激活；活化作用

• deactivate   v.  关闭；使无效

• Cooking fumes may activate the alarm.

  烹调时的油烟可能会触发警报器。

• The gene is activated by a specific protein. 这种基因由一种特异性蛋白激活。

• You need to type in a code number to deactivate the alarm.

  你要输入一个密码来关闭警报。

• But thinking about or remembering descriptions in terms of their social meaning activated the dorsomedial prefrontal cortex – part of the brain's social network – even as traditional memory regions registered low levels of activity.

  激活（大脑中的）背内侧前额叶皮层皮质

• Activating the brain's social network involved in socially motivated learning and memory may allow students to tap unused mental powers. 激活大脑的社交网络

• Now they are trying to figure out what molecular signaling processes activate those seed-building genes in resurrection plants – and how to reproduce them in crops.

  激活基因

BrE /ˈæktɪveɪt/   

NAmE /ˈæktɪveɪt/