One way to handle this potential problem might be to draw on the experience of U. S. programs set up in Ukraine after the collapse of the Soviet Union.
处理这种潜在问题的一种方法可能是借鉴苏联解体后在乌克兰成立的美国计划的经验。
2
To be more selective, you may prefix the mode expression with u to set the permission for users, g to set it for groups, and o to set it for others.
为了更具可选性，您可以给模式描述加前缀 u 来设置用户权限，g 来设置组权限，还有 o 为其他人设置。
3
That's exactly what a team of 150 U. S. and Russian scientists set out to do 15 years ago.