一旦完成向预付费方式的转变，手机的成本便成为更广泛移动业务接入的最大障碍——在上世纪90年代末手机的价格依然昂贵。
Once the switch to prepaid was made, the biggest barrier to broader mobile access became the cost of a handset, which was still an expensive item in the late 1990s.
要求提供货代费用的付费收据（副本即可）。
The payment receipt of forwarder expense(a duplicate copy)is inquried.
在美国，20世纪60年代，捐献的血液大部分取自付费的捐献者，这些人比普通人更容易患有乙肝。
In the United States in the 1960s, a large percentage of donated blood was obtained from paid donors, who were more likely than the general population to have hepatitis b.
但在20世纪80年代的医学院，他说因为抑郁而去寻求治疗让他感到很不安，他宁愿到外面去打付费的电话而不愿在自己的公寓内打电话寻求治疗。
But in medical school in the 1980s, he said he was so embarrassed about seeking help for depression that he went to a pay phone instead of his dorm to call a therapist.
但在20世纪80年代的医学院，他说因为抑郁而去寻求治疗让他感到很不安，他宁愿到外面去打付费的电话而不愿在自己的公寓内打电话寻求治疗。
But in medical school in the 1980s, he said he was so embarrassed about seeking help for depression that he went to a pay phone instead of his dorm to call a therapist.
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