intelligibility       
noun [ U ] uk/ɪnˌtel.ɪ.dʒəˈbɪl.ə.ti/ us/ɪnˌtel.ə.dʒəˈbɪl.ə.t̬i/
 易懂性
(of speech and writing) the quality of being possible to understand
  Foreign accented speech may affect intelligibility. 带有外国口音的讲话可能会影响理解。 
 She reviews articles for consistency and intelligibility.  她审查文章的一致性和可理解性。 
 See: intelligible
 - More examples
 - Intelligibility is paramount for non-native speakers.
 - Her difficulty producing sounds resulted in a reduction of the intelligibility of her speech.
 - Afrikaans is derived primarily from 17th century Dutch dialects, and a great deal of mutual intelligibility still exists.