六级词汇正序版-39

练习内容

[{"word":"effective","pronun":"[ɪˈfektɪv]","translation":"adj. 有效的，起作用的；实际的，实在的；给人深刻印象","audio":"effective.mp3"},{"word":"efficiency","pronun":"[ɪˈfɪʃnsi]","translation":"n. 效率；效能；功效","audio":"efficie