But not all of the brood have hatched. 然而有些雏鸟还没孵化出来

13. Few predators venture out during the heat of day.
    很少有捕食者会在白天冒着炎热觅食
14. But such safety comes at a price.
    但这种安全是需要付出代价的
15. Out in the open, the newly-hatched chicks are exposed to the crushing heat of the sun.
    刚孵化出的雏鸟暴露在烈日之下
16. But not all of the brood have hatched.
    然而有些雏鸟还没孵化出来
17. Until they do, the family will stay here.
    在全部孵化出来前 一家子都将留在这里
18. The adults take it in turns to protect the brood.
    成年鸵鸟轮流负责保护雏鸟
19. So whilst the female takes a well-earned break,
    当轮到雌鸵鸟休息时

来自《行星地球 第三季 第三集 Planet Earth S03E03 沙漠与草原》第 16 行