Each additional gray was associated with a twofold increase in radiation-related thyroid cancer risk.

结果发现，放射性水平每增加1个戈瑞，放射性相关的甲状腺癌的风险将增加1倍。

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After factoring in the impact of health status, having two or more surgeries requiring general anesthesia was associated with a twofold increase in learning disabilities.

把对健康状况的影响纳为重要因素的话，接受过2次或者2次以上手术麻醉的儿童会带来双倍学习障碍的风险。

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Although 64-bit processors typically have wide enough data busses to keep up fairly well, there's still a twofold increase in data to be moved when you switch to 64-bit data.

尽管64位处理器通常都具有足够的数据总线来保证一切运行良好，不过在需要切换成64位数据时，要移动的数据大小依然是双倍的。

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Even having a family history of breast cancer in a first degree relative carries about a twofold increase in risk.

FORBES: After 40 Years Of Research, What Do We Know About Preventing Breast Cancer?

Arizona, for example, has seen a twofold increase in salmonella reports, with an uptick beginning in June, said Dr. Joli Weiss, food-borne disease epidemiologist for the state Department of Health Services.

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