粉末标样
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powder standard sample
粉末标准样品
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The sample collection standard is a two-step procedure that is performed after an initial risk assessment is conducted and a visible powder is deemed a credible biological threat.
样品收集标准主要包括两大步骤，初始风险评估和可见粉末确定为生物威胁。
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