place and manner of articulation place manner bilabial voiced
而 /b/: voiced, bilabial, stop.
place of articulation: bilabial, labiodental, dental, alveolar
bilabial obstruents? 2017/4/17natural classesvoiced sibilants?
![alveolar stop [k] voiceless velar stop [p] voiceless bilabial](https://i.ssjz8.com/upload/1/img1.baidu.com%2fit%2fu%3d277462309%2c1277726731%26fm%3d253%26fmt%3dauto%26app%3d138%26f%3dJPEG%3fw%3d667%26h%3d500 "bilabial,inflectional morpheme")
alveolar stop [k] voiceless velar stop [p] voiceless bilabial