A PIGEON, oppressed by excessive thirst, saw a goblet of water painted on a signboard. —
一只被过度口渴所压迫的鸽子，在招牌上看到了一个画着水杯的图案。 —

Not supposing it to be only a picture, she flew towards it with a loud whir and unwittingly dashed against the signboard, jarring herself terribly. —
并没有意识到那只是一张图片，它发出巨大的嗡嗡声朝着它飞去，不经意间撞到了招牌上，摔得很惨。 —

Having broken her wings by the blow, she fell to the ground, and was caught by one of the bystanders.
它的翅膀因为撞击而折断，摔落在地上，被旁观者所捉住。

Zeal should not outrun discretion.
热忱不应该超过慎重。