阴平 (陰平) yīnpíng
          
              yīnpíng 
              
              noun 
              high and level tone; first tone 
              Domain: Linguistics 语言学
              
                , Subdomain: Phonetics 
              
              
                , Concept: Tone 声调
              
              
              
                Notes: The first tone in modern standard Chinese pronunciation, which is constant in intensity and is longer in duration than the second and fourth tones. It is [55] in Chao's tonal scale (Norman 1988, pp. 145-148).