已开展调查确定该男子的接触源。
Investigations have been 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 are being undertaken to determine the source of the man's exposure.
在每个国家首都的12个公共和私营药店开展调查。
Surveys were conducted in 12 public and private sector medicine outlets in each country's capital city.
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