Michael S. Reidy begins his important new book with an overview of the centrality of the sea to Britain's commercial, imperial, and social evolution. Understanding the movement of tides became ever more important as trade continued to expand and empire became increasingly important. The rise and fall of tides were fundamental to the movement of vessels in and out of Britain's major ports, and ports around the world. A lack of such knowledge had wrecked countless numbers of expensive ships, thus causing loss of valuable commerce and state revenues.
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机译：迈克尔·S·里迪（Michael S. Reidy）在撰写重要的新书时，首先概述了海洋在英国商业，帝国和社会发展中的中心地位。随着贸易的不断发展和帝国的日益重要，了解潮流的趋势变得越来越重要。潮涨潮落是船只进出英国主要港口以及世界各地港口的基础。缺乏这种知识已经摧毁了无数昂贵的船舶，从而造成宝贵的商业和国家收入的损失。
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