They now face a new threat 现在面临着新的威胁

20. On the coastlines, signs of the exhaustion of stocks abound.
    海岸线边 充斥种群灭绝的迹象
21. Colonies of sea mammals are getting smaller.
    海洋哺乳动物栖息地正在变小
22. Made vulnerable by urbanization of the coasts and pollution,
    它们由于沿岸城市化及污染而变得很脆弱
23. They now face a new threat
    现在面临着新的威胁
24. Famine.
    饥荒
25. In their unequal battle against industrial fishing fleets,
    在它们与工业化渔船对的不公平战争中
26. They can't find enough fish to feed their young.
    他们找不到足够的食物来哺育下一代

来自《家园 第二部分 Home Part2》第 23 行