lip-reading       
noun [ U ] uk/ˈlɪpˌriː.dɪŋ/ us/ˈlɪpˌriː.dɪŋ/
 唇读;观唇辨意
a way of understanding what someone is saying by watching the movements of their mouth
  Young deaf people expect to use speech and lip-reading with hearing people. 年轻的聋人希望与健听的人用语言和读唇术交流。 
 Lip-reading skills were of little use because her vocabulary was so small. 因为她的词汇量太小,所以唇读的技巧没什么用。 
 See: lip-read
 - More examples
 - She became qualified to teach lip-reading.
 - Real lip-reading depends on figuring out the words most likely to be spoken in a given context.
 - She remembers her own struggle to learn lip-reading in a "hearing" family.