Bob Littlefield beamed as he circulated through the crowd.
鲍勃佛尔德笑容，由于他分发穿过人群。
In Africa, alone, it has jumped from 7 million to some 80 million in five years, says Littlefield.
仅在非洲，手机用户数量在五年间就从700万猛增到8000万左右，Littlefield说。
In Africa, alone, it has jumped from 7 million to some 80 million in five years, says Littlefield.
仅在非洲，手机用户数量在五年间就从700万猛增到8000万左右，Littlefield说。
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