Nightmares persist with the dogs of the law in never ending pursuit.

The nuclei of the original cells persist in the protoplasmic membrane.

In some the protoplasmic contents may persist, in others they disappear.

Remnants of the left aortic arch persist sometimes in the shape of a ligamentous strand.

Now these modifications show hardly any tendency to persist, the one stable at high temperatures being formed at elevated temperatures, but changing in the reverse sense on cooling.