bird是什么意思

　　例句：

　　This species of bird is decreasing in numbers every year.

　　这种鸟的数量在逐年减少。

　　The area has a wealth of bird life.

　　这个地区栖息着大量的鸟。

　　The lake is noted as a home to many birds.

　　这个湖作为许多鸟类的栖息地而闻名。