But when the train dawdled at station after station , I began to wonder .
然而这次火车懒懒散散,站站停靠,这时我才开始生疑。
But when the train dawdled at station after station , I began to wonder , it suddenly dawned on me that this express was not roaring down the line at 90 miles an hour , but barely chugging along at 30 .