widened at base
底部加宽
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The widened section, usually concrete, at the base or bottom of a foundation wall, pier or column.
被加宽的部分，通常是混凝土，在基础墙壁，柱桩或支撑柱体的基础或底部。
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To fit the ships, the existing channels need to be widened and deepened with the berths at the base excavated.
BBC: Drilling rig dredges Portsmouth for aircraft carriers
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