The activity in each room could be observed through these windows.

No unusual activity had been observed from the North, officials said.

Their job is simply to observe suspicious activity and report it to the police.

This activity has not been observed again in a repeat of the same reaction.

This activity was also observed from the alpha decay of flerovium-287.

Gorkić's activity was observed by the police for a longer period.

Both these activities have not been observed since (see copernicium).

"I can only say that nobody in our agency is authorized to observe domestic activities, with or without a computer."

Their activity can be observed among strata of various ages.

No unusual activities were observed within the vicinity of the volcano.