3.1 有害的 harmful
(1) damaging ['dæmɪdʒɪŋ]：造成破坏的;有害的;损害的
Many chemicals have a damaging effect on the environment.
许多化学物质都对环境有破坏性的影响。
(2) ruinous ['ruːɪnəs]：耗资巨大的;无法承担的;破坏性的;导致严重问题的
The decision has proved to be ruinous.
事实证明这个决定造成了危害。
(3) destructive [dɪ'strʌktɪv]：破坏性的;极其危险的
The city witnessed the destructive force of the storm.
这座城市遭受了这场暴风雨的巨大破坏力。
3.2 困难的 difficult
(1) demanding [dɪ'mɑːndɪŋ]：要求高的;需要高技能(或耐性等)的;费力的;要求极严的
He found he could no longer cope with his demanding job.
他发现自己已无力应对这份劳神费力的工作了。
(2) laborious [lə'bɔːrɪəs]：耗时费力的;辛苦的
They had the laborious task of cutting down the huge tree.
他们要完成砍伐大树的艰苦工作。
(3) formidable ['fɔːmɪdəb(ə)l]：可怕的;令人敬畏的;难对付的
A formidable prospect lies ahead of him.
他的前景令人忧惧。
He took on the formidable task of reforming the whole system.
他承担起改革整个系统的艰巨任务。
3.3 无聊的 boring
(1) dull [dʌl]：枯燥无味的;沉闷的;无聊的;不明亮的
The conference was deadly dull.
会议开得死气沉沉的。
(2) tiresome ['taɪəs(ə)m]：令人厌倦的;无聊的;累人的
I find it very tiresome doing the same job day after day.
日复一日做相同的工作让我觉得非常无聊。
(3) tedious ['tiːdɪəs]：冗长的;啰唆的;单调乏味的;令人厌烦的
He that can read and meditate will not find his evenings long or life tedious.
会读书和思考的人不会感到长夜无聊或者生活乏味。
3.4 忧虑的 worried
(1) anxious ['æŋ(k)ʃəs]：忧虑的;渴望的;焦急的
I'm anxious for her to do as little as possible.
我盼她尽量少干。
He was anxious about the enormity of the task ahead.
他为眼前任务的艰巨性而感到焦虑。
(2) apprehensive [æprɪ'hensɪv] 忧虑的;担心的;疑惧的;恐惧的
She was deeply apprehensive that something might go wrong.
她很担心可能要出什么差错。
The long delay had made me quite apprehensive.
长时间的耽搁使我相当忧虑。
(3) fraught [frɔːt] 充满(不愉快事物)的;焦虑的;忧虑的;担心的
You're looking very fraught, Mildred! Is there anything the matter?
米尔德丽德!看起来你忧心忡忡，有什么不对劲吗?
It has been a somewhat fraught day.
这是令人颇为担忧的一天。
3.5 沮丧的 sad
(1)depressed [dɪ'prest] 抑郁的;沮丧的;意志消沉的;患抑郁症的
The news that he had not pass the exam depressed him a lot.
没有通过考试的消息让他很沮丧。
She felt very depressed about the future.
她感到前途无望。
(2) gloomy ['gluːmɪ] 黑暗的;阴暗的;幽暗的;忧郁的
The light is gloomy in the farm house , but the children study very very conscientiously .
农舍里光线灰暗，但孩子们学习很很认真。
They found him in gloomy, downbeat mood.
他们发现他情绪低落，无精打采。
(3) frustrated [frʌ'streɪtɪd] 挫败的;失意的;受挫折
The police frustrated the bandit's attempt to rob the bank.
警方挫败了匪徒抢劫银行的企图。
3.7 怀疑的 doubtful
(1) skeptical ['skeptɪkəl] 怀疑地;心存疑惑地;将信将疑地
However, I encourage you to be skeptical about what I tell you.
但是，我鼓励你们怀疑我所告诉你们的东西。
Many were skeptical about this solution.
许多人对这一解决办法表示怀疑。
(2) suspicious [sə'spɪʃəs] 感觉可疑的;怀疑的;令人怀疑的;不信任的
The ingenuous person had never thought of being suspicious of what others told him.
天真的人从来不会怀疑他人告诉他的话。
Most organizations are, quite understandably, suspicious of new ideas.
大多数机构对新想法持怀疑态度，这不难理解。
(3) incredulous [ɪn'kredjʊləs]
She gave me an incredulous glance.
她表示怀疑地向我瞥了一眼。
