约翰·埃姆斯利在《大自然的积木》(2001年牛津版)中写道，按照铯- 137分解速度，则“需要100年才能降低到以前1%的水平上。”

At that rate of disintegration, John Emsley wrote in "Nature's Building Blocks" (Oxford, 2001), "it takes over 200 years to reduce it to 1 percent of its former level."

youdao

约翰·埃姆斯利在《大自然的积木》(2001年牛津版)中写道，按照铯- 137分解速度，则“需要100年才能降低到以前1%的水平上。”

At that rate of disintegration, John Emsley wrote in "Nature's Building Blocks" (Oxford, 2001), "it takes over 200 years to reduce it to 1 percent of its former level."

youdao