实行用户费用并不是单纯的节省成本之举。
The introduction of user fees is not purely a cost-saving measure.
直接付费，包括用户费用，被确认为阻碍进展的最大障碍。
Direct payments, including user fees, are identified as the greatest obstacle to progress.
一旦病毒进入计算机，它会锁住所有文件，并要求用户支付解锁费用。
Once the virus gets into the computer, it locks all the papers and asks the user for money to unlock them.
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