These vast aquatic grasslands stretch for fifteen hundred square miles 这片广大的海洋牧场 面积可达1500平方英里

86. although they put out a few ribbon like leaves they produce very extended networks of fleshy stems, risomes, that are buried in the sand.
    海草长出叶子状的带状物 以此延伸它们埋在沙子里的肉质根茎.
87. At their lushest they can transform the sea bed into an underwater meadow.
    这种蓬勃的长势可以把海床覆盖在下面
88. The largest expanse grows in the shallow waters of Shark Bay, in Western Australia.
    世界上最大的草海在澳大利亚西部的鲨鱼湾
89. These vast aquatic grasslands stretch for fifteen hundred square miles
    这片广大的海洋牧场 面积可达1500平方英里
90. and, like terrestrial prairies, they support herds of grazers -- Dugongs.
    像陆地上的大草原一样 这里也养育了大量的食草动物--儒艮
91. Dugongs are the largest herbivores in the sea.
    儒艮是海洋里最大的食草动物
92. They can be three meters long and weigh half a ton
    可以长到3米长,半吨重

来自《行星地球 第一季 第九集 Planet Earth S01E09 海洋》第 89 行