These defects usually occur together, but they may occur separately.

Ready-to-wear fashion weeks occur separately and earlier than those of haute couture.

These other conditions may occur separately or together with haemosiderosis.

But any of these may occur separately without deflation.

These forms occur separately or as a mixture.

The damage to the two systems occurred separately several kilometers apart near Alexandria.

Viking raids occurred both separately and together with regular trading expeditions.

These processes can occur concurrently or separately depending on the host plant.

These three characteristic symptoms may occur separately, all at once or not at all.

The ability to repeat and imitate speech sounds occurs separately to that of normal speech.