in commission

In active service. Used of a ship.

服役中。用于船

In use or in usable condition.

在使用中或在使用條件中

on commission

With a sales commission serving as full or partial recompense for the work done

委托：具有用于對(duì)所作工作全部或部分酬金的銷售委托

sells boats on commission.

委托售船

out of commission

Not in active service. Used of a ship.

不在服役中。用于船

Not in use or in working condition.

不在使用或工作條件