OK, sir, just sit tight, and we'll have an ambulance there in about ten minutes.
好的,先生。你就在那边等着,救护车10分钟之内到。
would be like trying to meet a friend in London without a pre-arranged rendezvous and absurdly wandering the streets in the hope of a chance encounter.
就如同去伦敦见一位朋友,事先未约定地点,而荒唐地在街上游逛,以期待碰巧遇上一样。