借方总额必须和贷款总方相抵。
警方相信有精神错乱的那个男人，被认为要为8起攻击事件负责。
The man, who police believe is psychotic, is thought to be responsible for eight attacks.
然而，与东方相比，西方在更容易渗透的边界上面临着更多的外部威胁。
Compared with the East, however, the West faced a greater number of external threats along more permeable frontiers.
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