they reaffirm their bond. 它们重新确认了彼此间的关系

13. They mate for life.
    它们一生相伴
14. And this year's nesting season is just starting.
    今年的筑巢季节才刚开始
15. Before they face the challenges ahead,
    在携手面对未来的挑战前
16. they reaffirm their bond.
    它们重新确认了彼此间的关系
17. And they do so with an unusual ritual...
    为此有一种特别的仪式
18. ..at the entrance to a bat cave that they know well.
    将在它们熟悉的蝙蝠洞口举行
19. This rather curious gift
    这份奇特的礼物

来自《行星地球 第三季 第五集 Planet Earth S03E05 森林》第 16 行