在服务履约环节，AI实现了“沟通无国界”。在线咨询中，AI支持5秒内完成多语种实时互译；电话系统能提供同声传译。
// 易错点3：处理最终结果为空的场景（比如num="10"，k=2）
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the more successful of the two brands. The IBM 478x series ATMs, which you might
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