Resting heart rate was obtained by trained observers after the women sat "quietly" for five minutes.

This test is difficult to perform, and often requires a trained observer.

A trained observer, however, would be praying for the Chinese troops.

They flooded into his eyes with the automatic perception of a trained observer.

Lighting could play tricks even on the most trained observer.

He was a trained observer and an analyst second to none.

As they moved down the corridor, he was obviously missing nothing; clearly a trained observer.

A trained observer would have said delicate machinery of some sort was being operated.

She read his bearing with the clarity of a trained 'observer.

That was the conclusion of a trained outside observer.