fluent
adj
1 (of a person) able to speak or write a language or perform an action smoothly, accurately and with ease (指人)語言流利的, 文字流暢的, 動作準確、 輕松的
a fluent speaker (of Spanish) (西班牙語)說得流利的人
be fluent in speech 講話流利.
2 (of speech, a language or an action) expressed in a smooth and accurate way (指言語、 語言)流利而通順的; (指動作)靈活而準確的
speak/write fluent Russian 說[寫]流利的俄語
fluent movements, ie ones that are flowing and graceful 協調優美的動作.