She stood at the door observing the peaceful domestic tableau around the fire.

她站在门口，看着炉火周围阖家祥和的景象。

《牛津词典》

There are four forms of forest fire detection, and they are patrolling on the ground, observing on the watchtower, patrolling in the air and detection by the satellite from the outer space.

地面巡护、了望塔定点观测、空中飞机巡护和空间卫星监测是实现林火监测的四种形式。

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I. (AP) Survivors and family members of the 100 people killed in a Rhode Island nightclub fire are observing the 10th anniversary of the blaze, which broke out when pyrotechnics for the rock band Great White ignited flammable packing foam that had been installed inside the club as soundproofing.

NPR: Deadly RI Nightclub Fire Remembered 10 Years Later