英语听力：自然百科 大堡礁 堡礁内外(3)

It's all exciting to see a large animal in the sea, and of course, the turtles are very iconic species in marine¹ world.

能看到大型海洋动物总是令人很兴奋，不用说海龟是非常有代表性的海洋动物。

And I'm surrounded by them on this dive.

我现在被它们包围着。

Hundreds and hundreds of turtles are in the water column above me, passing over the reef's crest² and now in the blue water.

成千上万的海龟正处于我上方的洋流中，它们随水流掠过礁顶，游进蔚蓝的海域中。

The turtles all converge³ on small islands made of coral rock and sand, known as the coral cases, but not all are suitable for nesting.

海龟都朝小岛汇聚，小岛是由珊瑚与石砂构成的，也叫珊瑚岩。但不是所有的礁石都适合筑巢。

Some only are sank down, exposed only at low water.

有些只是低潮时才露出的沙丘、

And many others have beaches that swamp to high tide.

许多有海滩的沙丘会在涨潮适变得泥泞不堪。

1 marine   

adj.海的；海生的；航海的；海事的；n.水兵

参考例句：

• Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
• When the war broke out,he volunteered for the Marine Corps.战争爆发时，他自愿参加了海军陆战队。

2 crest   

n.顶点；饰章；羽冠；vt.达到顶点；vi.形成浪尖

参考例句：

• The rooster bristled his crest.公鸡竖起了鸡冠。
• He reached the crest of the hill before dawn.他于黎明前到达山顶。

3 converge   

vi.会合；聚集，集中；(思想、观点等)趋近

参考例句：

• The results converge towards this truth.其结果趋近于这个真理。
• Parallel lines converge at infinity.平行线永不相交。