Most people know that smoking causes lung cancer. But it also has been shown to be a major cause of cancers of the mouth, esophagus, kidney, bladder and pancreas.

大部分人都知道吸烟会引起肺癌，但也有报道表明它还是引起口腔癌、食道癌、肾癌、膀胱癌、胰腺癌的主要因素。

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The National Cancer Institute is sponsoring trials that include head-and-neck, kidney, bladder, brain and colon cancers.

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The same target chemical was also present in cancers of the lung, skin, kidney and bladder, they said.

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The U.S. National Cancer Institute is sponsoring trials that include cancers of the head and neck, kidney, bladder, brain and colon.

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