aythya americana造句

例句与造句

1. Several species of waterbirds, formerly frequently encountered during migration, are only rarely seen nowadays . These include, for example, the common loon ( " Gavia immer " ), American wigeon ( " Anas americana " ), redhead ( " Aythya americana " ), canvasback ( " Aythya valisneria " ), and several species of mergansers.
2. It's difficult to find aythya americana in a sentence. 用aythya americana造句挺难的