speaker的發音：
美?[?spik?r]? 英?[?spi?k?(r)]
speaker的意思：
n.演講者；揚聲器；說話者；發言者
例句：
1.You?will?calm?your?nerves?and?be?a?much?more?effective?speaker?if?you?speak?to one?person?at?a?time,?for?a?few second?each.
如果妳每次只對壹個人講話，每次只講壹會，妳就會鎮定下來，成為壹個更加有影響力的發言者。
2.If?you?think?I'm?going?to?tell?you?that?public?speaking?is?simple?and?that?anyone?can?become?an?accomplished?speaker?overnight,?guess?again.
如果妳認為我將告訴妳公***演講其實很簡單而且任何人都能夠壹夜之間成為壹個老練的演講家，那麽妳猜錯了。
3.In?fact,?the?process?by which?I?was?selected?as?the?keynote?speaker?remains?something?of?a?mystery?to?me.
實際上，我被選為大會主要發言人的過程，仍然對我來說是個奇跡。