The floor of the Atlantic Ocean is split in two by an immense volcanic mountain chain that winds unbroken for forty five thousand miles around the globe. 大西洋被一条无边的火山山脉劈成两半, 绕地球绵延45000英里
The Aleutian Island chain running west from Alaska is the gateway to the Bearing Sea. 阿拉斯加(美国)西部的 阿留申群岛是通向白令海的大门
The algae die and the food chain collapses. 藻类死亡 食物链因此崩溃
Surprisingly, they are the basis of a food chain 令人吃惊的是 它们竟然是食物链中的第一环
In the absence of plants this food chain is based on a continuous supply of bat droppings. 在缺少植物的情况下 这里的食物链 完全依赖供应不断的蝙蝠粪便
This huge mountain chain continues the great spine that runs from Patagonia to Alaska. 巨大的山系脊梁从巴塔哥尼亚 一直延伸到阿拉斯加