Viruses remain in the tubers from year to year, causing progressive deterioration; again, the solution would be to purchase fresh tubers.

Snowline: The lowest elevation at which snow remains from year to year and does not melt during the summer.

It grows satisfactorily in gardens in the UK climate, remaining in the garden from year to year by self-seeding.

The goal was to try to keep the countries' relative positions loosely correct - Canada north of the United States, and Mexico to the south - and have the countries remain in roughly the same spots from year to year.

The percentage of students remaining in school from year to year.

Most regular venues of major Alpine ski races have a local ROC which remains in place from year to year.

After it closes on March 7, the exhibition, "Cantos Paralelos: Visual Parody in Contemporary Argentinian Art," is to travel to the Phoenix Art Museum, remaining from July 24 to Sept. 26 and next year to museums in Bogota, Colombia, and Buenos Aires.