cannot，must not，should not，unable，be incapable of ；
[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] 但法律专家们不能肯定这一指控是否成立。 But legal experts are not sure if such a charge can stick.
not as good as，inferior to，（来不及） too late，fall short of ；
[例句] 绅士应该总是彬彬有礼,即便是对地位不及自己者. A gentleman should always be civil, even to his inferiors.
[例句] 这部歌剧不及他晚期作品娴熟。 The opera lacks the polish of his later work.
nonperformance，default，noncompliance，nonfulfilment，nonfulfillment ；
[例句] 她要是不履行诺言就不光彩了。 It would have been dishonourable of her not to keep her promise.
[例句] 他因不履行合同而被起诉. He was sued for breach of contract.
not so，not the case，if not so，otherwise，else ；
[例句] 别说我活该，不然让你尝尝我的拳头。 Don't say it serves me right or I'll thump you.
[例句] 除非你要搞什么小动作，不然你为什么单要一间房？ Why did you need a room unless you were up to something?
not allow，forbid，prohibit，bar from，disallow ；
[例句] 国外救援人员不准进入灾区。 Foreign aid workers will not be allowed into the stricken areas.
[例句] 谁也说不准谈判还会拖多久。 There's no telling how long the talks could drag on.
（永不磨灭） immortal，eternity，athanasy，immortality，immortalization；
[例句] 火焰可以算作不朽的宗教象征。 The flame is a quasi-religious emblem of immortality.
[例句] 此作品是英国文学的不朽名作之一. The work is one of the great monuments of English literature.
invariance，invariance property，constantness，fixity，immutability ；
[例句] 不变性指的是一致的部分. Invariance refers to areas of agreement.
[例句] 相对论涉及两个似乎对立的概念, 相对性和不变性. The theory of relativity is concerned with two seemingly opposite ideas, relativity and invariance.
not get along well，be on bad terms，be at odds，bad [ill] blood，at issue ；
[例句] 米尔斯和鲍德温一家人好像有些不和。 There is, it seems, some bad blood between Mills and the Baldwins.
[例句] 除了回答问题，艾达都不和他说话。 Ida would not speak to him except to answer questions.
be irrelevant，have nothing to do with，[数； 光] incoherent，disrelation，out of the picture ；
[例句] 据悉，她有过一些与婚姻不相干的个人问题。 She was known to have had personal problems unconnected with her marriage.
[例句] 这件事由我负责, 跟旁人不相干. I am responsible for the matter. None of other's business.
no matter，despite，however，disregard，in despite of ；
[例句] 不管上哪儿，保安人员都紧跟在他们身后。 Wherever they went they were closely followed by security men.
[例句] 他说过不管资历如何，任何编辑人员他都有可能解雇。 He has said he will fire editorial employees without regard to seniority.
not in the least，not at all，no，nohow，none ；
[例句] “我告诉过你普雷斯克毫不知情的，”肯普颇为不耐烦地说道。 "I told you Preskel had no idea," remarked Kemp with some asperity.
[例句] 迪肯毫不掩饰自己对贝尔顿的憎恶。 Deacon made no secret of his loathing of Bayldon.
regardless of，not stick to，irrespective ，not confine oneself to ；
[例句] 她不拘礼节，让人耳目一新。 She is refreshingly informal.
[例句] 不拘礼节的谈话语气 a casual and conversational tone
not do one's best，not exert oneself，fail to apply one's full strength，half-heartedly ；
[例句] 他否认当晚守望不力。 He denied that he'd failed to keep a proper lookout that night.
[例句] 坠机是导航不力的直接后果。 The crash was a direct result of inadequate navigational aids.
unavoidable，bound to，invariably，would naturally ；
[例句] 忙中不免出错. We tend to make mistakes when we do things in a hurry.
[例句] 手术不免会导致病人更多的疼痛. The operation unavoidably caused the patient much pain.
discomfort，trouble，unwell，indisposed ；
[例句] 这些各种各样的疾病、不适都是身体健康状况欠佳的一种表现。 These various complaints are part of a continuum of ill-health.
[例句] 他的右膝盖开始出现不适。 He began to have trouble with his right knee.
impatient of，be weary of，weary ；
[例句] 有些士兵有点儿不耐烦。 There is a certain impatience among some of the soldiers.
[例句] “我告诉过你普雷斯克毫不知情的，”肯普颇为不耐烦地说道。 "I told you Preskel had no idea," remarked Kemp with some asperity.
do not deserve mention，insignificant，not worth mentioning，inconsiderable，have nothing in one ；
[例句] 他们是些微不足道的人. They are small potatoes.
[例句] 他在自己村里也许算个要人, 但在这里却不足道. He may be a man of consequence in his own village, but he is nobody here.
（错处； 过失） fault，blame，ain't，an't，isn't ；
[例句] 成功不是终点，失败也并非末日，最重要的是继续前进的勇气。 Success is not final, failure is not fatal: it is the courage to continue that counts.--Winston Churchill
[例句] 决定你人生高度的，不是你的才能，而是你的态度。 Your attitude, not your aptitude, will determine your altitude.--Zig Ziglar
noninterference，nonintervention，let be ；
[例句] 不干涉的职员管理方法 a hands-off approach to staff management
[例句] 我们不干涉法国对北非之行政管理. We would not disturb the French administrative control of North Africa.
inharmonious，discordant，out of tune，out of line ；
[例句] 她又小又弱，穿一身军装看起来很不协调。 She was small and fragile and looked incongruous in an army uniform.
[例句] 我看得出来有些颜色相配，有些却不协调。 I can see that some colours go together and some don't.