entranced adj.着迷的；狂喜的（adj.filled with wonder and delight）
go about their business 忙于它们的事
We enjoy staring at them,entranced as they go about their business .
译文：我们乐于盯着它们看,出神地看它们自顾自地忙碌.
We enjoy staring at them,（and are）entranced as they go about their business .