speaker
英 ['spiːkə]
美['spikɚ]
	    - n. 演讲者;扬声器;说话者;说某种语言的人
 - n. (Speaker)人名;(英)斯皮克
 
英英释意
- 1. someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous);
 - "the speaker at commencement"
 - "an utterer of useful maxims"
 
- 2. electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance