And on a longer mission, say to Mars, more of those DNA breaks could build up.

而执行更长的任务，比如去火星，会形成更多的 DNA 断裂。

DNA breaks down at temperatures above 400 degrees Fahrenheit and cremation happens at very high temperatures, like 1500 degrees or 2000 degrees Fahrenheit.

脱氧核糖核酸在华氏 400 度以上的温度下分解，火葬发生在非常高的温度下，比如华氏 1500 度或 2000 度。

And the warhead in CRISPR is this purple protein that acts like molecular scissors to cut DNA, breaking the double helix into two pieces.

CRISPR中的弹头是一种紫色的蛋白质，就像分子剪刀一样切割DNA，将双螺旋断裂成两段。

That defense mechanism is now better known as CRISPR. And the warhead in CRISPR is this purple protein that acts like molecular scissors to cut DNA, breaking the double helix into two pieces.

这种防御机制现在被称为 CRISPR。 CRISPR 中的弹头是这种紫色蛋白质，它像分子剪刀一样剪断 DNA，将双螺旋结构分成两部分。