Remember what we said about pheromones being odorless ?

还记得信息素是没气味的吗？

Are pheromones a secret weapon for dating ?

费洛蒙是约会的秘密武器吗？

All that hullaballoo is about one thing : pheromones .

这一番折腾，就是为了一个原因：外激素。

When finding food , they lay down pheromones to mark the route to and from their nest .

当找到食物时，蚂蚁会分泌信息素来标记从巢穴到食物的路径。

As to pheromones , whether humans have these is questionable .

至于信息素推论，人类是否拥有这类物质还是一个未知数。