名词
中文翻译：Unknown
同义词：
['gravity anchor', 'gravity stake']
例句：
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1. The gravity pier is used to measure the weight of objects on land.
重力桩用于测量物体在陆地上的重量。
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2. The gravity pier was installed in the harbor to prevent ships from running aground.
重力桩被安装在港口中，以防止船只搁浅。
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3. The gravity pier is essential for maintaining the stability of the bridge.
重力桩对于保持桥梁的稳定性至关重要。