The presence of the male form of fruitless somehow activates the circuit , in ways that are still unknown.
"The presence of the beloved person or object or landscape activates the senses; the imagination functions only in their absence."
Don't you know that your presence here and any powerful explosion could activate one or more of our nuclear devices?
The presence of nitrogen activates the csiR gene located downstream of the gabP gene.
Our presence activated it.
His presence activated the lighting and it went from near dark to daylight intensity as he settled in at the main chair and flipped on the diagnostics.
She surmised the activity was connected to the distant but regular blare of what sounded like an alarm, and wondered if their presence had activated the warning system.
Our presence must have activated them.
A living presence within the transporter will activate it.
The presence of a stutter dial tone will activate a red LED; while absence will deactivate it.