Research teams have conducted studies that show beyond all reasonable doubt that tobacco smoking is associated with a shortened life expectancy.

研究组进行的研究超出了所有合理的怀疑，表明吸食烟草与人的预期寿命的缩短有关。

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Research teams have conducted studies that show beyond all reasonable doubt that tobacco smoking, particularly cigarette smoking, is associated with shortened life expectancy.

许多研究小组进行的研究不容置疑地表明，吸食烟草，特别是吸卷烟与预期寿命缩短有关。

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He said it looked like they could have formed a suicide pact but he could not be sure "beyond all reasonable doubt".

BBC: The car involved in the investigation

"The prosecution say that Mr Cowan fits that profile perfectly, and the prosecution say that you can be sure - all 12 of you, beyond reasonable doubt - that Mr Cowan was the gunman, " he said.

BBC: Andrew Farndon