... provide sb with sth提供某人某物 conduct a survey开展一次调查 ask one piece of information at a time一次问一条信息 ...
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疾病控制中心的调查规模为中央统计局调查规模的1/10，每两年开展一次调查，而中央统计局的调查是10年举行一次。
The CDC survey is based a sample about one-tenth the size of the CBS study's, and comes out every two years, while the CBS survey is held once in 10 years.
另外开展了一次实地调查，确定这些家庭是否从2005年前安装的深管井中获取饮用水。
A field survey was carried out to determine whether households obtained drinking water from deep tube Wells installed in 2005.
美国证交会近期对金融危机时期出现违约的抵押债券交易所开展了一系列调查，这是其中最新的一次行动。
This is the latest action in a string of SEC investigations into mortgage bond deals that went bust during the financial crisis.
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