I second bb's opinion but at the same time, I believe that its the lower verbal score that can cause some problems for a prospective student. For instance, if some one has a score of 690 with Q 48, V36, then he/she will be having some issues while applying in top schools. Top business schools put emphasis on high verbal scores, since they want to have a candidate who can communicate good in the class. (Yes, I do agree that class correspondence is greatly measured by TOEFL or English language tests but some schools think otherwise).
So, in your case, I dont think you need to retake. All you need to do is work hard on your application, discover and share something unique about yourself in the application and develop interesting stories.
Best of luck!!
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