来自《犯罪现场调查第14季第17集第17集》

It comes from corn.

提取自玉米
Which is really good for us. It can tell us a whole lot.

这对我们很有帮助可以从中了解很多
'Cause thanks to you, you left a whole lot of it

这可要感谢你你在麦克风上
on that microphone.

留下很多这种东西
"It's a long..."

"这是一条"
You see, xylitol breaks down in a very predictable way.

木糖醇的分解非常有规律
And when measured in concentrated levels,

当进行浓度分析的时候
it can give me a very specific timeline.

可以很轻易地算出停留时长
Think of this gum,

想象一下这颗口香糖
when chewed, as a... as a body decomposing.

它被咀嚼时正如尸体在腐烂
Oxygen dissipates, muscles stiffen at a certain rate.

氧气耗尽肌肉以一定的速率僵化
That's what gives us the time of death.

这些是我们推测死亡时间的依据