正当他们准备返航时，一次强烈的风暴阻断了他们的归途，而他们又遇到了意想不到的困难。 But as they are about to return, an unprecedented storm descends on the area and blocks their way home. To make things worse something unexpected happens.
一笔意想不到的遗产使他得以还清买房子欠下的债。 An unexpected legacy enabled him to wipe off the debt on his house.
恐怕这意想不到的事故会把今天的晚宴搞糟。 I'm afraid the unexpected accident may botch up the dinner tonight.