unexpectedly，to one's surprise，beyond one's expectation，peradventure，unawares ；

[例句] 我原以为他真的受伤了,不料他只是在装样子而已. I thought he was really hurt but he was faking.

[例句] 他们上气不接下气地赶到公司,不料却被告知他们被开除了. They reached the company out of breath only to be told they were fired.

frequently，from time to time，often，now and then，at intervals ；

[例句] 他们不时地听到大卡车的轰鸣声。 Now and then they heard the roar of a heavy truck.

[例句] 人群里不时发出几声抱怨和欢呼。 Scattered groans and whoops broke out in the crowd.

resentful，discontented，dissatisfied，be critical of，discontentment ；

[例句] 对于现况的不满，不能只是抱怨，要有勇气作出改变。 If you're not satisfied with the life you're living, don't just complain. Do something about it.

[例句] 有报道称首都弥漫着不满的情绪。 There are reports of widespread dis-content in the capital.

only，just，merely，nothing but，but then ；

[例句] 他们所谓的回答不过是表示承认的咕哝罢了。 Their replies were no more than grunts of acknowledgement.

[例句] 滚滚浓烟盘旋翻腾，恶臭味呛得她喘不过气来。 Dense smoke swirled and billowed, its rank fumes choking her.

（不停止） endlessly，ceaselessly ；

[例句] 她被媒体和公众纠缠不休。 She was besieged by the press and the public.

[例句] 他们总是争吵不休。 They rowed all the time.

misfortune，adversity，（不希望发生而发生的） unfortunately，unfortunate，disaster ；

[例句] 不幸的是，几乎不可能看到这些重大问题得到回复。 Unfortunately, there is little prospect of seeing these big questions answered.

[例句] 由于发生了不幸的意外，我知道消息的时候已经晚了一天。 Through some unfortunate accident, the information reached me a day late.

incompatible，incompatibility ；

[例句] 这程序与法律原则不相容. The procedure is abhorrent from the principles of law.

[例句] 速度和安全未必不相容。 Speed and safety are not necessarily incompatible.

not conform to，be unsuited to，not fit，not suited to，disagreement ；

[例句] 斯图尔特现在变得只要和别人意见不合，就准备大吵一架。 Stewart has developed a tendency to mix it verbally with the opposition.

[例句] 牛津的社交圈过于开放,不合她的胃口. Oxford's social circle was far too liberal for her taste.

uneven，not level，injustice，unfairness，disaffection ；

[例句] 在粗糙不平的水泥窗台上有一条细细的发光水印。 A thin, glistening thread of moisture ran along the rough concrete sill.

[例句] 这里又有一座高低不平的城堡建在悬崖绝壁之上。 Here another rugged castle crowns the cliffs and crags.

depression，recession，slump，（不兴旺） depressing state，stagnancy ；

[例句] 只要经济不景气，连锁反应就开始了。 Whenever recession strikes, a chain reaction is set into motion.

[例句] 生意不景气也未必全是坏事。 Some good might come of all this gloomy business.

（不正派） improper，dishonourable ；

[例句] 他还认为她在领导人选举中有不端行为。 He also felt she had not behaved honorably in the leadership election.

[例句] 她因行为不端而被停职。 She had been suspended from her job for discreditable behaviour.

unsuitable，improper，inappropriate ；

[例句] 法官说警方对围攻安排不当。 The judge said the police had mishandled the siege.

[例句] 他被告知房门安装不当。 He was told that the doors had been fitted incorrectly.

unfavourable，disadvantageous，harmful，detrimental，disadvantage ；

[例句] 她对该地区一无所知，这显然对她不利。 Her ignorance of the area put her at a decided disadvantage.

[例句] 这显然会对孩子不利。 This obviously works against the interests of the child.

no matter ，whether ... or ...，regardless of，irrespective of，without reference to ；

[例句] 该中心向所有人开放，不论种族和宗教信仰如何。 The centre is open to all, no matter what race or creed.

[例句] 任何人，不论宗教、肤色或信仰，都可以加入。 It takes in anybody regardless of religion, colour, or creed.

intranquil，unpeaceful，unstable，uneasy，discomposure；

[例句] 嘲笑声的背后潜伏着一种越来越强烈的不安。 Behind the mocking laughter lurks a growing sense of unease.

[例句] 国际投资者已对该国的经济状况感到紧张不安。 International investors have become jittery about the country's economy.

waterproof，watertight，impermeable，imperviousness ；

[例句] 台上有不透水的罩篷. There was a waterproof canopy over the platform.

[例句] 它不能通过云母这样的不透水的物质. It could not pass through material impervious to water such as mica.

infusibility，insolubility ；

[例句] 在未成熟的干酪中, 全部氮都以不溶性蛋白质状态存在. In the young cheese, all nitrogen is present in the form of insoluble protein.

[例句] 对水不溶性葡聚糖和水溶性葡聚糖合成抑制的效果相对都比较好的是丁香酚、胡椒碱、茶多酚. Eugenol acidtannic acid showed over 40 % inhibition effect to soluble glucan.

abnormal，irregular，abnormality ；

[例句] 当然，并不是所有的酗酒者和吸毒者都会生育出不正常的后代。 Of course, not all alcoholics and drug abusers produce deviant offspring.

[例句] 这个想法中有某种不正常的、令人痴迷的东西。 There's something morbidly fascinating about the thought.

cannot，should not，must not，not allowed ；

[例句] 他最不可能干这种事情。 He would be the last person who would do such a thing.

[例句] “我能说一句吗？”——“亲爱的，如果你非说不可的话，好吧。” "Could I have a word?" — "Oh dear, if you must."

not suitable，inadvisable，inappropriate ；

[例句] 埃布尔先生的医生说他不宜出行。 Mr Abel's doctor has said he is unfit to travel.

[例句] 他接受了第三次检查，被告知不宜上班。 He had a third examination and was declared unfit for duty.