An early warning system puts everyone on the alert. “即时预警系统”使大家都警觉起来

61. But at dusk the plateau becomes a more dangerous place.
    可是一到傍晚 高原便成了 一个危机四伏的地方
62. With the grazing largely over
    吃草活动基本结束
63. there's a last chance to socialise before returning to the sleeping cliffs.
    狮尾狒们抓住最后一点机会进行社交 然后返回睡觉的悬崖
64. An early warning system puts everyone on the alert.
    “即时预警系统”使大家都警觉起来
65. Their day ends as it began, safe on the steep cliffs.
    这一天结束了 和开始时一样 它们又坐在了陡峭而安全的悬崖上
66. The Ethiopian volcanoes are dormant,
    埃塞俄比亚的火山正处于休眠期
67. but elsewhere others still rage.
    可是其它地方的火山仍在怒吼

来自《行星地球 第一季 第二集 Planet Earth S01E02 山地》第 64 行