Five students stand in pairs with their backs to the blackboardFive students stand in pairs with their backs to the blackboard
Waves are running and seagulls are in pairs on the shoreWaves are running and seagulls are in pairs on the shore
The tenderness of two horses in the middle of a winter forestThe tenderness of two horses in the middle of a winter forest
Silhouette of a pair of dolphins in a jump with a landscape of sky and seaSilhouette of a pair of dolphins in a jump with a landscape of sky and sea