affectedly       
adverb uk/əˈfek.tɪd.li/ us/əˈfek.tɪd.li/
 矫揉造作地,装模作样地;不自然地
in a way that is artificial and not sincere
  She laughed affectedly. 她笑得很做作。 
 He had a set smile and spoke in an affectedly soft voice. 他笑容僵硬,用一种做作的轻柔声音说话。 
 See: affected
 - More examples
 - As he talked, his voice grew affectedly cultured.
 - The officer yawned affectedly.
 - She waved goodbye in an affectedly dramatic way.