Bessler said emergency search and rescue missions and relief operations are ongoing.

贝斯勒说，紧急搜索、救援和救灾行动正在展开。

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"We have a lot of polluted water, we have heat, we have civilians exposed to these elements, which is the ideal environment for the spread of waterborne diseases," Bessler said.

贝斯勒说：“这里有很多污水，气温炎热，人们暴露在这些环境中，这种环境最容易传播以水为介质的疾病。”

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"Last year ... 4 million people worldwide lost their homes, out of which you have half a million displaced in Pakistan, " said Manuel Bessler, a top U.N. official in Islamabad.

CNN: Displaced Pakistanis crowd camps as they flee fighting