The sample numbers required to achieve a 95% confidence, with high precision, that Martian environments are lifeless can exceed many hundreds. This might not be achievable by sample return only and might require human explorers.

中文翻译：

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需要大量的样本来证明火星环境是没有生命的


要达到 95% 的置信度和高精度，即火星环境没有生命，所需的样本数量可能超过数百个。这可能无法仅通过样品返回来实现，并且可能需要人工勘探人员。