求翻译：　每队替补队员2人。替换时需经裁判员验明资格，并于检录登舟前替换完毕，登舟后不得替换是什么意思？

Each team bench for two people. Verification of qualifications should be replaced by the referee, and replaced in front of the roll call Dengzhou completed shall not be replaced after Deng Zhou

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Each team substitutes the member 2 people.When replace must verify the qualifications after the referee, and in sports official who calls up athletes in their turn ascends in front of the boat to replace finished, after ascends the boat not to have to replace

Each team of substitutes 2. Replacement referees proving when qualification, and replace is completed before the boat to check, after the boat may not replace

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