She can speak English fluently.
fluently，英语单词，主要用作副词，作副词时译为“流利地；通畅地”。
双语例句：
1、He spoke fluently and without unnecessary hesitations.
他说得很流畅，毫不支吾。
2、She speaks French very fluently, but her pronunciation lets her down.
她法语讲得很流利，但美中不足的是发音不大好。
3、We were doubly lucky inasmuch as my friend was living on the island and spoke Greek fluently.
我们真是幸运极了，因为我的朋友住在岛上而且希腊语说得很流利。
紫枫2007
