in a triceBritish EnglishBrE old-fashioned very quickly or soon 一刹那，瞬间 He should be here in a trice. 他应该很快就到这儿了。
in a trice• In a trice the Wolverines and the other four Scout squads were outside with their Sergeants, and scattering in different directions.• In a trice, office machines can set the type and print it out in fine detail.• The information would be downloaded in a trice.• It was gone in a trice, saving him from a terrible thrashing or many long hours standing in disgrace.• The best and longest-lasting tans are acquired slowly - quick tans are usually fast burns and peel off in a trice.
→ in a trice at trice(1)