normalization
n. 正常化，标准化

northward
adj. 向北的；
adv. 向北方

notable
adj. 值得注意的
[同]remarkable
adj. 著名的

noted
adj. 著名的
a noted performer 著名的表演家
[难点]
be noted for 以…而著名
be noted as 以作为…而著称

notify
vt. 通知
I will notify my lawyer to write out the agreement. 我将通知我的律师把这份协议写出来。
[同]inform
vt. 报告，宣告
[难点]
notify sb. to do 通知某人做…
notify sb. that…. 通知某人…
notify sb. of sth. 通知某人某事

notion
n. 想法，概念
I haven’t the faintest notion what you’re talking about.
我对你谈论的东西毫无概念。
[同]concept

notorious
adj. 臭名昭著的，声名狼藉的
[同]ill-famed
[难点]
be notorious for 以…而臭名远扬
be notorious as 以…身份而臭名远扬

notwithstanding
prep. 尽管，虽然
Notwithstanding any other agreements,we will make a new contract with the firm.
尽管有其他协议，我们仍将与这家公司签订一份新合同。
[同]despite
adv. 尽管，还是

nought
n. 零，无

nourish
vt. 提供养分
nourishing food 营养丰富的食物
[同]nurture
vt. 养育

nourishment
n. 食物，营养品

novelty
n. 新颖，新奇；新奇的事物

number
v. 共计，达到…总数
The people at the meeting numbered several thousands. 出席会议的总共有几千人。

numerical
adj. 数字的，用数字表示的

nun
n. 修女，尼姑

oar
n. 桨，橹；划手，桨手
v. 划，划动，划行

oath
n. 誓言，誓约
take / make an oath 发誓
[同]swear

obedience
n. 服从，顺从
Soldiers act in obedience to the orders of their officers. 军人按照军官的指示行动。
[难点]
in obedience to 遵照，服从….

obedient
adj. 服从的，顺从的
[同]submissive
[难点]
be obedient to 对…服从

obligation
n. 义务，责任
[同]duty

obscure
adj. 昏暗的
[同]dim
adj. 模糊的，晦涩的
Very few people understood his lecture , the subject of which was very obscure.
很少有人理解他的演讲，它的主题非常晦涩。
[同]vague

observation
n. 言论，意见

obstinate
adj. 固执的，顽强的
[同]stubborn

offence
n. 犯罪，犯错；冒犯，触怒

offensive
adj. 冒犯的，攻击的
n. 进攻，攻势

offer
v. 呈现，出现
Take the first opportunity that offers. 抓住第一个出现的机会。

offset
n. 分支，支脉；抵销，补偿
v. 抵销，补偿
The cost of getting there was offset by the fact that it’s a very cheap place to live.
由于当地的生活费用低廉，可以补偿去那里的旅费。

offspring
n. 子孙，后代

ohm
n. 欧姆（电阻单位）