流利地

He had the assurance to claim that he could speak ten foreign languages perfectly.

他竟狂妄地宣称他能流利地讲十语。

He is fluent in five languages.

他能流利地说五语言。

You may be able to read French well, but speaking it fluently is a different kettle of fish entirely.

你也许能很流利地看法语，但要流利地说法语就另一码事了。

It is quite unthinkable that a child like him can speak a foreign language so fluently.

像他这样的孩子居然能流利地说一语, 真难以置信。