The key and most urgent problems in the current river basin research are of multi-levels and integration type. Such as how accurate is the water balance at the basin scale?
目前流域研究中最关键、最有待解决的问题就是集成层面上的问题，如：流域尺度上的水分平衡的精确状况是什么样的？
Financial statement dated no more than 6 months old at the time you submit it to OIA, showing your name, date, the current balance and type of currency.
这里面说的是提交的时候资金证明不能在6个月内过期还是资金证明过期不超过6个月？
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