The calls of the siamang gibbons begin as a duet between the dominant male and female. 合趾猴通过叫声来联系公猴和母猴

94. Because fruiting trees are so valuable,
    因为结果实的树很宝贵
95. many monkeys are territorial
    许多猴子都有自己的领地
96. And if you live in the treetops there's perhaps no better way of staking your claim to a territory, than this.
    如果你居住在树顶上 那么可能没有比这种声明领土主权更好的方法了
97. The calls of the siamang gibbons begin as a duet between the dominant male and female.
    合趾猴通过叫声来联系公猴和母猴
98. The rest of their families soon join in, and it results in a frenzy of activity.
    家庭的其他成员也加入进来,猴群开始活跃起来
99. The calls can carry over a mile,
    他们的叫声超过1英里远
100. and their message is clear.
     传递的信息也相当明确

来自《行星地球 第一季 第八集 Planet Earth S01E08 热带雨林》第 97 行