了跟踪调查

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1.

Maynard and her colleagues studied the medical records of the group up to July 2000, by which time 483 cases of cancer had been diagnosed.

而梅纳德和她的同事对这些人进行了跟踪调查，发现到 2000年6月，其中的 483 人被诊断患了癌症。

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2.

The author traced and investigated the progress of agribusiness in Jilin province and suggested the countermeasures to solve the questions .

对吉林省农业产业化运行状况进行了跟踪调查，对其存在问题及化解对策提出了建议。

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3.

For this study , researchers tracked people such as Naomi Glass who still cleans her home and does volunteer work .

为研究这个问题研究者们对老年人进行了跟踪调查象劳密格拉斯还自己做家务，甚至还做一些志愿者工作。

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4.

Yang followed death rates for the study group through 2007 .

杨俊毓于 2007年对研究对象的死亡率数据进行了跟踪调查。

www.chinadaily.com.cn

5.

They then found out whether they had died by April last year .

去年四月份，又对他们的死亡情况进行了跟踪调查。

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