the observational data were irrefutable
... incomplete observational data 残缺观测数据 The observational data were irrefutable 这些观测资料是不容怀疑的 free of observational data catchments 径流预报 ...
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the observational data were irrefutable
观测数据是无可辩驳的
以上为机器翻译结果，长、整句建议使用 人工翻译 。