As Saville-Troike (1985) highlights, silence, as well as sound, is symbolic in nature, and the concept of silence is wide-ranging. Silence can be used to express rich meaning in a certain situation, such as approval, refusal, reverence, awe, indirectness and so forth. For example, when one asks you a question that you do not want to answer,you can keep silent so as to express your refusal euphemistically.Judging from above, we may draw conclusions that silence is a linguistically significant category composing an integral part of the total framework of communication. It is not only a superficial linguistic phenomenon but also a deep psychological phenomenon.