turn and turn about

Tanımlar (İngilizce)

1. zarf By equal alternating periods of service or duty; by turns.

   “[...] the three streamliners, still on their 29½ hr. schedule, start at 9.40 a.m., also turn-and-turn-about, and so arranged that the 9.0 and 9.40 a.m. departures are by different routes each day; [...].”