but this is a special alliance from which both partners benefit. 但是这种特殊联盟能使双方都得到好处

53. These rare creatures are usually very shy
    这种罕见的动物通常很胆小
54. but they drop their guard when the Gelados are around.
    但只要狮尾狒一来到身边 它们便放松警惕
55. You might expect that grazers would avoid each other's patch
    你或许会认为食草动物 总是尽量互相避让
56. but this is a special alliance from which both partners benefit.
    但是这种特殊联盟能使双方都得到好处
57. It's not so risky to put your head down
    它们可以毫无顾虑地埋头吃草
58. if others are on the lookout.
    因为旁边有站岗的“哨兵”
59. Ethiopian wolves -
    西门豺

来自《行星地球 第一季 第二集 Planet Earth S01E02 山地》第 56 行