In which case those slice marks may not happen to a live animal.

在这种情况下，这些划痕可能不会发生在活的动物身上。

There are many whales still swimming around today that have slice marks on them from encounters with propellers.

今天仍有许多鲸鱼在船周围游动，其身上有碰到螺旋桨而造成的切口。