But when they added a benzyl group to it, they ended up with something different, a compound that we call denatonium.

但是当他们往里面添加苄基后，得到了一种不同的化合物：苯甲地那铵。

" To average out" means to add a group of numbers and then divide by the number of items in the group.

“平均” 是指将一组数字相加， 然后除以该组中的项目数。