- has enabled one animal to spread into cities everywhere,
让一种动物遍布世界各个城市 - and in huge numbers.
而且数量庞大 - Pigeons are by far the most successful urban bird.
鸽子是目前最成功的城市鸟类 - Here, in Albi, in the south of France,
在法国南部的阿尔比 - the pigeons come to the river to bathe.
鸽群飞到河边沐浴 - They need to preen their flight feathers,
它们要整理飞羽 - clean off the city dust,
清洗掉城市的灰尘