他说不出鹦鹉是什么，甚至连显而易见的鸵鸟也说不出。

He could not say what a parrot or even the unmistakable ostrich was.

youdao

那么，是什么阻碍了这样显而易见的进步呢？

What, then, is getting in the way of such evident progress?

youdao

那么，是什么阻碍了这样显而易见的进步呢？

What, then, is getting in the way of such evident progress?

youdao