beguilingly       
adverb uk/bɪˈɡaɪ.lɪŋ.li/ us/bɪˈɡaɪ.lɪŋ.li/
 令人着迷地,蛊惑地
in a way that is interesting and attractive, but perhaps not to be trusted
  She smiled beguilingly at him. 她对他媚然一笑。 
 The idea is beguilingly simple. 这个想法简单得令人垂涎。 
 See: beguiling
 - More examples
 - The warmth and softly scented air grew beguilingly stronger.
 - He spoke in a beguilingly friendly tone.
 - The actors beguilingly use classic fairy tales and the stories of Hans Christian Andersen to drive home the way lives are really lived.