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全文听写（以音频为准），英式拼写
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wekiu
Everest
Mauna Kea
Society Islands
French Polynesia
hundred写100
Measured from the sea floor, the wekiu's home is the tallest mountain in the world, about a kilometre taller than Everest. But it won't hold this record forever. After millions of years of growth, this mountain is slowly but surely losing height at a rate of 20 centimetres every 100 years. In fact, it's so massive that it's buckling the sea floor beneath it and sinking into the ocean. Mauna Kea's future can be glimpsed in the Society Islands of French Polynesia. The peaks of these islands once rose much higher than this from the ocean floor. It's been almost 2 million years since their volcanoes first broke through the ocean. But erosion is washing away their volcanic cores. Now the only growth occurs just below sea level, on what was once the mountain's sloping flanks. In the shallow waters around an island's base, coral reefs rise towards the surface. |
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发表于 2016-8-2 13:14:14