deck center line

例句：

1. 1.The deck center line is the main support for the ship's structure.
   甲板中心线是船舶结构的主要支撑。
2. 2. The crew had to adjust their positions on the deck center line to avoid collision.
   船员们不得不调整他们在甲板中心线上的位置以避免碰撞。
3. 3.The captain carefully marked the deck center line with a marker before starting the engine.
   船长在启动引擎前用标记笔小心地在甲板中心线上做了标记。