Element 43 has a very fast rate of decay.

43号元素的衰变速度非常快。

youdao

The variant rate of decay rate is zero within thhe accuracy errors.

在精确的实验误差范围内，衰减速率的变化率为零。

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Check back in a few hours to compare the rate of decay and the resulting smells.

几小时后，比较两者的腐烂速度和气味。

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According to Mr Bryan, who runs the college's architectural stone conservation course, the structure is sound but work is needed to slow its rate of decay.

BBC: Rebecca Fountain in Bath

Unlike archaeological radiocarbon dating based on the fixed rate of decay of the carbon-14 isotope, there is simply no fixed rate of decay of basic vocabulary, which would allow us to date ancestral proto-languages.

BBC: English language 'originated in Turkey'

On checking equipment in his laboratory, he was surprised to discover that the rate of radioactive decay changed before the solar flare.

BBC: System could warn of solar storms