2. Smaller earthquakes can also be caused by
volcanic activity, landslides, mine blasts, and nuclear tests.
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较小的地震也会由火山活动、山崩、煤矿瓦斯爆炸和核试验引起。
3. Iceland is peculiarly
volcanic because it is formed by the intersection of a hotspot and a mid-ocean ridge.
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冰岛尤其是由火山构成的,因为它是由一个热点和一个海中间的脊的交点形成的。