有害的(harmful)

damaging【例】Many chemicals have a damaging effect on the environment。许多化学物质都会对环境有破坏性的影响。

ruinous【例】The decision was to prove ruinous。后来证明这个决定造成了危害。

destructive【例】Severe damage witnessed the destructive force of the storm。严重的损失表明了这场暴风雨的巨大破坏力。

困难的(difficult)

demanding【例】He found he could no longer cope with his demanding job。他发现自己已无力应对那份劳神费力的工作了。

laborious【例】They had the laborious task of cutting down the huge tree。他们接受了伐大树的艰苦工作。

formidable【例】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。

无聊的(boring)

dull【例】The conference was deadly dull。会议开得死气沉沉的。

tiresome【例】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。

tedious【例】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。

忧虑的(worried)

anxious【例】He was anxious about the enormity of the task ahead。他为眼前任务的艰巨性而担忧。

apprehensive【例】The long delay had made me quite apprehensive。长时间的耽搁使我相当焦虑。

fraught【例】It has been a somewhat fraught day。这是令人颇为担忧的一天。

沮丧的(sad)

depressed【例】She felt very depressed about the future。她感到前途无望。

gloomy【例】They found him in gloomy, downbeat mood。他们发现他情绪低落，无精打采。英语六级怎么算分

frustrated【例】Both sides in the dispute appeared very frustrated at the lack of progress。争执双方因事情毫无进展而显得十分沮丧。

怀疑的(doubtful)

skeptical【例】Many were skeptical about this solution。许多人对这一解决办法表示怀疑。

suspicious【例】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。

incredulous【例】She gave me an incredulous glance。她表示怀疑地向我瞥了一眼。