kē / xué / jiā / gēn / jù / shuāi / biàn / qū / xiàn / gū / suàn / le / zhè / zhǒng / wù / zhì / de / bàn / shuāi / qī

科学家根据衰变曲线估算了这种物质的半衰期。

Scientists estimated the half-life of this substance from its decay curve.