has been a long-standing problem
has been a long-standing problem 是由来已久的问题 a knotty problem question etc 难以解决的疑难 ..
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As noted in the report, lack of resources has been a long-standing problem for an initiative that aims to reach large Numbers of very poor people.
正如报告所指出的那样，缺少资源是那些旨在影响到大量极为贫困人员的行动所遇到的一个长期问题。
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