Element 43 has a very fast rate of decay.

43号元素的衰变速度非常快。

youdao

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。

youdao

That fall into the cave happened 1.977 million years ago, according to dating based on the rate of decay of uranium in the rock layer that holds the fossils.

根据保存这些化石的岩石层里铀衰变率的基础上所确定的年代，那次掉入洞穴事件发生在197.7万年前。

youdao

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