The unspent balance was attributable primarily to lower than budgeted requirements for mine detection and mine-clearance services, owing to the failure of the parties to agree on the demarcation of the border, which impacted the implementation of the mine-clearance programme.
45. 出现未用余额，主要是由于各方未商定划界问题而影响到扫雷方案的实施，造成探雷和扫雷服务所需资源低于预算。