13.pump out ballast water in ballast tanks

排压载水舱的压载水。

In fact, ballast water has been linked to several outbreaks of cholera across the world!

事实上，压舱水已经和世界范围内的几次霍乱爆发联系起来了！

For three hours, the dirigible circled the landing field at Lakehurst New Jersey, dumping more water ballasts than ever before in vain efforts to level off.

这艘飞船在新泽西州莱克赫斯特的机场上空盘旋了三个小时，倾下了比以往任何时候都多的压舱水，但却无法平衡船体。

Lionfish can become unintended stowaways in water tanks and travel a long distance to where the ballast water is released.

狮子鱼可能会意外地偷渡进入水箱，并游很长的距离到达压载水释放的地方。

But there are other more likely ways they made the journey: Big marine vessels, like container ships, need ballast water to retain their stability after they've offloaded their freight.

但它们还有其他更可能的方式完成旅程：大型船舶，例如集装箱船，在卸下货物后需要压载水来保持稳定性。

The way zebra mussels usually travel across the ocean is that a ship takes on some fresh " ballast water" in Europe and then empties that water into American waterways when it arrives.

斑马贻贝通常穿越海洋的方式是， 一艘船在欧洲装载一些新鲜的“压载水” ，然后在到达美国时将这些水排入美国水道。