Dead soldiers are replaced by new ones at the start of each phase.

Most officers are too old and have to be replaced by young ones.

Bad policies in the past may continue to cause problems, long after they have been replaced by good ones.

Leaves typically last one year and are then replaced by new ones.

In 1843 the open coats were replaced by green closed ones.

In 1955, the red socks were replaced by blue ones for home games.

During the 19th and 20th centuries most were replaced by ones made of glass.

In the same year, the blue socks were replaced by black ones.

We cannot wait ten or 15 years for coaches to be replaced by new ones.

"Their customers are always dying off and not being replaced by new ones."