Pivoting on a pin inside the hull, it swings down to provide ballast and resistance against sideways motion of the boat caused by the wind blowing from one side.

它围绕船底的一个钉子旋转，放下时提供压载力，以抵抗由于单侧风导致的船只侧向摆动。

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It also explores concepts of intact and damaged stability, hull structure strength calculations and ship resistance.

本课程还对完整及破舱稳定性、船体结构强度计算和船舶阻力的概念给予介绍。

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In designing the hull form, the main point is the influence of ship type change on resistance and lines optimization.

对于船型设计而言，关键问题是研究船型变化对阻力产生的影响以及线型的优化。

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The technology works by reducing frictional resistance between the vessel hull and seawater using air bubbles along the bottom of the ship.

FORBES: Archer Daniels Midland & Mitsubishi Team Up To Blow Bubbles