Cal Snyder, a historian, points out that the 250 "vernacular memorials", erected in parks, water fronts, fire-stations and schools all over the five boroughs, work well because of their simplicity.

历史学家(Cal Snyder)认为在纽约市五大行政区的沿岸、救火站和学校竖建250座“平民纪念碑”是可行的，因为它们简洁达意。

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The extraction of ocean fronts is to extract the edge information between ocean water mass, which belongs to the high frequency extraction from ocean fields.

海洋锋信息的提取是提取海洋水体问的边缘信息，是属于海洋要素场高频信息的提取。

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One, a former diver with the Royal Navy who had been paralysed in a car accident, told Paul that it was impossible for them to swim on their fronts without their heads flopping into the water.

BBC: NEWS | Health | A bike for the paralysed