自2008年12月以来，已发生多起类似的酸袭事件，装有腐蚀性液体的瓶子从步行区的高楼上坠落，共造成超过100人受伤。
More than 100 people have been injured in similar attacks since December 2008 when bottles of acid were dropped from buildings in a pedestrian zone.
如果我们生活在一个高层，我们可以步行或楼上楼下。
If we live in a high-rise, we can walk upstairs or downstairs.
如果我们生活在一个高层，我们可以步行或楼上楼下。
If we live in a high-rise, we can walk upstairs or downstairs.
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