轮船进入陌生的港口前要雇用引航员.A steamer takes on a pilot before coming into a strange harbour.这位引航员引导我们通过了危险的暗礁区.The pilot guided us through the dangerous reefs.马克·吐温曾当过密西西比河上的引航员.Mark Twain was once a river pilot on the Mississippi....