流利地

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

竟狂妄宣称能讲十种外语。

He is fluent in five languages.

能说五种语言。

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

你也许能很看法语，但要说法语就是另一码事了。

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

像的孩子居然能说一种外语, 真是令人难以置信。