They also had brain power. 它们还拥有脑力

51. They can feed their young whenever they choose,
    它们可以随时喂养幼崽
52. even when food is scarce.
    甚至包括食物稀缺的时候
53. But milk wasn't the early mammals' only secret weapon.
    但是母乳并不是 早期哺乳动物唯一的秘密武器
54. They also had brain power.
    它们还拥有脑力
55. And it's still just as important today.
    这在今天依然非常重要
56. In the forests of Costa Rica,
    在哥斯达黎加的森林中
57. this capuchin monkey is trying to solve a puzzle.
    这只卷尾猴正在努力解开一道谜题

来自《我们星球上的生命 第一季 第七集 Life on Our Planet S01E07 地球继承者》第 54 行