To minimise abuses, the police who staff the UPPs are newly recruited and specially trained.
为减少滥用职权，UPPs里配备都是经过特殊训练招募的新警员。
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Police say a note found by a burning bus on November 24th explicitly linked the campaign, the UPPs and the 2016 Olympics, due to be held in Rio: "with UPPs, no Olympics", it read.