So you can see in black, after a month -- they're very short-lived; that's why we like to study them for studies of aging -- in black, after a month, the normal worms are all dead.
所以能看到这条黑色曲线，一个月以后-- 这些线虫的寿命很短，这就是为什么我们用它们来做 寿命的研究-- 黑色曲线表示一个月以后，正常线虫都死亡了