silence
英 ['saɪləns]
美['saɪləns]
	    - n. 沉默;寂静;缄默;不谈;无声状态
 - vt. 使沉默;使安静;压制;消除噪音
 - int. 安静!;别作声!
 
英英释意
- 1. the state of being silent (as when no one is speaking);
 - "there was a shocked silence"
 - "he gestured for silence"
 
- 2. the absence of sound;
 - "he needed silence in order to sleep"
 - "the street was quiet"
 
- 3. a refusal to speak when expected;
 - "his silence about my contribution was surprising"
 
- 4. the trait of keeping things secret