bird guano

• 禽类

bird guano的用法和样例：

例句

1. A chicken is a suitable specimen for the study of the general external features of a bird.
   鸡是研究禽类外部特征的合适范例。
2. And Australia's leading animal research facility is helping global efforts to control the deadly bird flu.
   澳洲开展的野生动物调查工作有助于进一步控制禽类致死病的扩散。