Pump out ballast water.

排出压载水。

Use of ballast water obtained exclusively from a u.

使用美国公共自来水系统的水作压载水。

Ballast water is carried in cargo ships to provide needed stability.

压载水由货船装载，以提供必要的稳定性。

So, it is necessary to take some measures before the ballast water is discharged.

所以，在排放压载水之前对其进行一些处理是非常必要的。

Ship's ballast water is crucial in keeping ship balance and ensuring safety voyage.

船舶压载水对保证船舶稳性和航行安全起着至关重要的作用。