零既可以用zero,也可以用字母o代替
13700000000:one three seven, zero zero zero zero, zero zero zero zero;或者 one three seven, o o o o,o o o o;或者 one three seven, followed by eight zeros/o's
856-0000:eight five six, zero zero zero zero;或者 eight five six, o o o o;或者 eight five six, followed by four zeros/o's
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