n.牧犬

heading dogs───导盲犬

hearing dog───助听犬；导盲犬

herding dog───牧羊犬

leading dog───领头的狗

hearing dogs───助听犬

herding dogs───牧羊犬

leading dogs───领头的狗

heading for───前往；出发；取向于

heaving down───使（船）倾斜

By dusk we were dog-tired and heading for home.───到黄昏时我们累极了，于是回家。

Also, the dog won't think you're trying to invade his territory if you're heading in the opposite direction.───同样的，如果你朝着相反的方向走的话，它也不会认为你想侵犯它的领土（也就不会伤害你）。

Another popular event involves having the dog split six sheep into two groups of three and conducting each group in turn to small pens through a defined course by heading dogs.───另外一种受欢迎的赛事要求由两只牧羊犬参赛。比赛要求犬只将六只羊分成两组，每组各三只，并且轮流两群羊进行控制，使羊群排列整齐地在领头犬只的带领下通过规定的路线。