...without being detected. 悄无声息地靠近

113. This family has four growing pups.
     这一家豺养育着四只幼崽
114. A chital deer could feed the entire pack.
     一只花鹿能喂饱整个家族
115. The pack must get close...
     豺群必须尽可能靠近花鹿
116. ...without being detected.
     悄无声息地靠近
117. But with eyes and ears everywhere...
     但四周都是敌人的眼线
118. ...the deer are soon aware of the dogs' presence.
     豺的踪迹很快就暴露了
119. The pack can't afford to give up.
     豺群不能放弃

来自《行星地球 第三季 第五集 Planet Earth S03E05 森林》第 116 行