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.

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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.

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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.

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