A powerful earthquake struck off the coast of Indonesia's Sumatra island Wednesday afternoon, killing at least 100 people and trapping thousands of people beneath flattened buildings.

印度尼西亚苏门答腊岛海域周三下午发生强烈地震，造成至少100人死亡，还有数千人被埋在夷为平地的建筑物之下。

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