frustrating[英][frʌˈstreɪtɪŋ][美][ˈfrʌstreɪtɪŋ]
adj.产生挫折的，使人沮丧的，令人泄气的;
v.令人沮丧; 挫败; 使不成功( frustrate的现在分词 ); 使受挫折;
例句:
1.
You find the process of reaching the goal boring, frustrating, or unrewarding.
你发现实现目标的过程乏味不堪、令人沮丧甚至根本不值得。
2.
I know how frustrating european summits can be.
我明白欧洲峰会的过程会有多么坎坷。
