He spent most of the time observing the natural world around him.

I did not have time, however, to observe their work, because the librarian came to us.

"Just about 5,000 times less than the earth," observed the lieutenant.

Time to add stress to the experimental system and observe how the subjects changed.

First they came and spent some time observing us.

Perhaps most important, I spend time observing the mountain views from my deck and windows.

Before taking him into custody the police spent some time observing the suspect's daily routine.

Spend some time observing Mid-town traffic, and see for yourself.

This, as The Times observed, was not an easy task.

The Times observed that this was considered "a fairly racy thing to do."