But China's secretive budgeting system makes it impossible to verify these figures.
但中国的保守预算体制使得这些数据难以证实。
According to some accounts which are impossible to verify, a major barracks or security headquarters has fallen to the opposition.
据一些无法证实的报道，一个主要的兵营或安全总部已经倒向反对派一边。
“Based on stories from defectors, much of it has fallen into disrepair —though this is impossible to verify in person,” Melvin said.
“根据叛逃者的讲述，很多都已年久失修—--但这一点我无法亲自证实，”梅尔文说。
"Based on stories from defectors, much of it has fallen into disrepair - though this is impossible to verify in person," Melvin said.
“依据叛逃者的故事，它的许多地方因年久失修垮掉了尽管这不可能当面证实，”梅尔文说。
Foreign officials who watch Venezuela closely say that Cuban agents occupy key posts in Venezuela's military intelligence agency, but these claims are impossible to verify.
近距离观察委内瑞拉的外国官员表示古巴军官在委国军情局担任要职，但这些说法未能得到证实。
They said they gave up their Kalashnikovs without a fight. They had been well treated by their captors, they added, although it was impossible to verify this independently.
他们说自己没有开火就交出了武器，还说俘获他们的人给予了恰当的待遇，不过后者显然难于印证。
They said they gave up their Kalashnikovs without a fight. They had been well treated by their captors, they added, although it was impossible to verify this independently.
他们说自己没有开火就交出了武器，还说俘获他们的人给予了恰当的待遇，不过后者显然难于印证。
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