and protecting it behind a barricade of spines. 叶片特化成刺以防止水分散失

59. Cacti are unique to American deserts.
    仙人掌是美国沙漠中独一无二的植物
60. They all hoard water,
    它们肥硕的茎干
61. storing it in swollen stems
    有储水功能
62. and protecting it behind a barricade of spines.
    叶片特化成刺以防止水分散失
63. They're so successful that they dominate these deserts.
    这套策略成功地让它们主宰着这片沙漠
64. But this forest of spikes can cause problems
    但这片尖刺丛林也给居住在此的动物们
65. for the animals that live here.
    带来了很多麻烦

来自《行星地球 第二季 第四集 Planet Earth S02E04 沙漠》第 62 行