All rocks,historical objects, plants,and wildlife must be left untouched.

VOA: special.2009.10.07

It's as if the commodity of the bride is deemed truly valuable only if it can be guaranteed pure and untouched.

这就好像新娘这件商品,只有在完全的纯净没有动过才是有真正价值的。

耶鲁公开课 - 弥尔顿课程节选

So we end up with 1 p orbital completely untouched, and three hybrid s p 2 orbitals.

没有变化，所以我们得到的是1个完全没有变化p轨道。

麻省理工公开课 - 化学原理课程节选