“神秘地”的英语可以翻译为：mystically，uncannily ...

星期六晚上停止营业后他神秘地失踪了.He vanished mysteriously after the close of business on Saturday night.他突然间神秘地出现了；我既没看见他来，也没听见他的脚步声。He had materialized out of thin air; I had not seen or heard him coming.老汉神秘地一笑,指着正北的方向说: “ 喏,从那里, 北京....