No further potential source of exposure was identified.
未查明进一步潜在接触源。
Investigation of the July family cluster was unable to determine the source of exposure.
对7月家庭群集的调查未能确定接触源。
Additional food samples are currently being analysed to identify any potential secondary source of exposure.
目前还在对其它食物样本进行分析，以确定是否存在任何潜在的其它接触源。
Investigations into the source of his infection indicate similar environmental exposure as his mother.
对其感染源的调查表明与其母亲相似的环境接触。
Investigations into the source of her infection indicate exposure to sick and dead poultry.
对其感染源的调查表明曾接触过病禽和死禽。
Investigations are being undertaken to determine the source of the man's exposure.
正在开展调查以便确定该男子的接触源。
Investigations have been undertaken to determine the source of the man's exposure.
已开展调查确定该男子的接触源。
The source of her exposure is currently under investigation.
目前正在调查其接触源。
Investigations into the source of his infection indicate possible exposure at poultry market.
对其感染源进行的调查表明他可能去过家禽市场。
Exposure to sunlight is the main source of vitamin D.
日晒是维生素d的主要来源。
Exposure to sunlight is the main source of vitamin D.
日晒是维生素d的主要来源。
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