And we've learned that, in this species -- and I suspect in others as well -- these hydrocarbons, this layer of grease on the outside of ants, is different as ants perform different tasks.
我们已经知道，在蚂蚁这类生物—— 我怀疑对其它生物也是这样-—— 这些碳氢化合物，这层涂在蚂蚁外表的油脂， 会因不同的工种而不同。