falsetto       
 noun [ C ] uk/fɔːlˈset.əʊ/ us/fɑːlˈset̬.oʊ/  falsettos
 (男高音的)假声
a form of singing or speaking by men using an extremely high voice
  For his role as a young boy, he had to speak in a high falsetto. 由于他的角色是个小男孩,他必须尖起嗓子说话。 
 falsetto       
adjective, adverb uk/fɔːlˈset.əʊ/ us/fɑːlˈset̬.oʊ/
 假(高音)嗓子的
A falsetto voice is extremely high.
  The lead singer has a falsetto voice. 领唱用假声唱。 
 to sing falsetto 用假声唱