Sehnsucht. The word translates as "longing," but Germans insist that the real meaning remains elusive to the broad sector of English speakers, falling somewhere between the sweetness of nostalgia and the desperation of lust. The Dutch bring a glimpse of it to us on a revolving stage to strains of Beethoven when the decidedly international Nederlands Dans Theater descends upon Zellerbach Hall for only the briefest of stays by one of the world's great contemporary dance companies. Along with Sehnsucht, artistic director Paul Lightfoot of Britain, who began his career as a dancer with the company in 1985, and his longtime collaborator Sol Léon, from Spain, present their Schmetterling (Butterfly), to music by Stephen Merritt and Max Richter. Both pieces are West Coast premieres. Tickets went fast for their last sold-out appearance in the Bay Area in 2011; don't wait, lest longing become regret.