i've come up with a recording on this and will need time to edit it and will post it asap, i think i've get something from this, ie, the pronounciation of /dr/ from /d + r/ ... and that of /tr/ from /t + r/ ... i've watched a little girl sounding that way /t + r/, it might be the natural way of sounding it. 
Then, it might be the same case with /d + r/ scenario. 
i'll listen to it more and feedback. thanks.
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                    dr 就是d+r 发快了的和音, 老外说慢了, 有时会把d和r 分的比较明显。
                     -DirtyTalk- 
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                        05/14/2013 postreply
                                                10:29:21
                    
                                                            
                    
                    
                                        
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                        05/14/2013 postreply
                                                10:29:21
                    
                    
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                    纠正一下,dr 的快发音是/d3/+r, 非常慢发音是d+r
                     -DirtyTalk- 
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                        05/14/2013 postreply
                                                10:48:13
                    
                                                            
                    
                    
                                        
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                                                10:48:13
                    
                    
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                    是的,听到过。慢读和快读发音变化巨大。
                     -yingyudidida- 
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                        05/14/2013 postreply
                                                11:03:25
                    
                                        
                    
                    
                                        
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                        05/14/2013 postreply
                                                11:03:25
                    
                    
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                    i listened to yours several times and it seems right as a fast p
                     -yingyudidida- 
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                        05/14/2013 postreply
                                                10:30:18
                    
                                        
                    
                    
                                        
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