Listen to these lines from "Song of Myself": And as to you Death, and you bitter hug of mortality, it is idle to try to alarm me.

VOA: special.2009.04.12

- If you eat these raw, which they do in many places around the world, if you eat a bitter one, you could, in fact, get enough cyanide to kill you.

如果你生吃它们的话，它们在世界上的很多地方都存在，如果你吃了一个苦的根，可能，实际上，它所含的氰化物的量足以令你死亡。

麻省理工公开课 - 化学原理课程节选

There's different types of the root that you can get called the bitter and the sweet.

这些根有不同的类型,被称为苦的和甜的。

麻省理工公开课 - 化学原理课程节选