So the challenge was to try and get them to do what we wanted them to do by listening to the weather, the lay of the land, and creating things that would let the sheep flow and go where we wanted them to go.
因此，面临的挑战是要试着让它们 做我们想要他们做的， 通过观察天气、地形， 做一些东西使羊群走向我们想让它们去的地方。