Dr Martha Linet, the head of radiation epidemiology at the us National Cancer Institute, has looked at the same research as Carpenter but has reached a different conclusion.
美国国立癌症研究所的辐射列病学主任MarthaLinet博士也曾做过与Carpenter教授一样的研究，但得出的结论却不同。
A skillful carpenter, on the other hand, will drive the nail with a few firm, deft blows, hitting it each time squarely on the head.
而一个娴熟的木匠，只需坚实巧妙地正对钉头敲几下，就能一钉到底。
A skillful carpenter, on the other hand, will drive the nail with a few firm, deft blows, hitting it each time squarely on the head.
而一个娴熟的木匠，只需坚实巧妙地正对钉头敲几下，就能一钉到底。
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