This can limit the time spent observing a given object.

After a lifetime spent observing, painting, photographing, lecturing on and writing about birds, the obsession (his word) with all things winged has not abated.

Its representatives spend very little time observing field tests of weapons, the report said, and the office's reports on tests are based primarily on information contained in documents supplied by the military services.

For during the two decades he spent observing China, he witnessed one of the great political and social upheavals of our time.

After a season spent observing the Met's operation under his predecessor, Edward Johnson, Sir Rudolf took control in June 1950.

A visit to Central Park gains from time spent observing these magnificent creatures.

Other people hang above, below, and behind him, but Silenus spends little time observing them.

What did make sense was the two days they spent observing every move of the camp.

THE first week of the general election campaign I spent carefully observing election coverage on television.

Now and then, during the minutes we spent observing this rude feast, Enkidu and I exchanged whispers, but for the most part we watched in silence.