英语发音练习 
 如果单词前面是ex, 重音在第二个音节。第一个音节,第三个音节都可以说快点。比如: 
  
 Exam 连读eg-zam
 重音zam Exalt
Exact
Exert
Expect
Expend
Explain
Excuse
Exactly
Exertion
Expecting
Existed
Examine
Exhausted
Expansive
Extended
Explicit
Exception
英文规律一直有exceptions. 这里的exception是:
Excellent
Excellent的第一个音节是重音
 55
                            55
                             9
                            9
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