threshold of classification
threshold of classification
分类阈值
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Either way, it's clearly beyond the threshold for classification as an INES level seven event, although an order of magnitude lower than the 5.2 million TBq released from Chernobyl.
BBC: Fukushima: As bad as Chernobyl?