frustratingadj. 令人沮丧的v. 使沮丧（frustrate的ing形式）Despite all thegoodwill in the world, the Middle Eastpeaceprocessremainsaselusive and frustratingasever.尽管全世界都对其给予厚望，中东和平进程还是像以往那样难以捉摸、令人沮丧。 disappointingadj. 令人失望的；令人扫兴的v. 令人失望（disappoint的ing形式）；辜负…的期望Theydo not have topay for expensiveseats at the theatre, the cinema, orthe opera, only todiscover, perhaps, that the showisdisappointing.他们不必花钱买昂贵的戏剧院、电影院或歌剧院座位票，也许到了最后才发现演出是那么令人失望。
