adj.使人沮丧的；令人泄气的
动词frustrate的现在分词.
Sales is a frustrating profession. 销售是一项令人沮丧的职业。
At best there would be a frustrating compromise. 充其量他们将做出令人泄气的妥协。
It is frustrating to learn that all these years' efforts have come to nothing. 得知这些年的努力都付之东流真令人泄气。
