另外驼鸟和食火鸟也是光脖子的，它们这是为了加快释放奔跑过程中产生的热量。

And ostriches and emus, too, are bare-necked-in their case to radiate away the heat generated when they run.

youdao

另外驼鸟和食火鸟也是光脖子的，它们这是为了加快释放奔跑过程中产生的热量。

And ostriches and emus, too, are bare-necked-in their case to radiate away the heat generated when they run.

youdao