But just as their ancestors were beginning to make progress, 但正当它们的祖先开始取得进展时

78. The monkeys have discovered their very own insect repellent.
    猴子们发现了它们自己的驱虫剂
79. Free from pesky biting insects,
    没有了讨厌的昆虫叮咬
80. the clever capuchins can finally relax.
    聪明的卷尾猴终于可以放松一下了
81. But just as their ancestors were beginning to make progress,
    但正当它们的祖先开始取得进展时
82. the warm, wet conditions in which they had thrived began to change.
    曾令它们兴旺发展的暖湿条件 开始发生变化
83. The Antarctic landmass started to split away from South America...
    南极大♥陆♥开始从南美洲分离
84. creating the space for new ocean currents...
    为新的洋流创造了空间

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 81 行