namely  | ad. 即,就是,换句话说 by name; by particular mention; expressly; that is to say  |  
 narcotic  | n. 麻醉的,催眠的 the addictive drug, such as opium that reduces pain, alters mood and behavior; inducing sleep  |  
 narrator  | n. 讲述者 someone who tells a story  |  
 nausea  | n. 作呕,恶心 the feeling of sickness in the stomach by an urge to vomit; strong aversion; disgust  |  
 naval  | a. 海军的,军舰的 relating to, or adjacent to the sea; relating to marine shipping or navigation  |  
 navigation  | n. 航海 guidance of ships or airplanes from place to place  |  
 needy  | a. 贫穷的,生活艰辛的 poor; indigent; being in need; impoverished  |  
 neglect  | v. 疏忽,忘记 disregard; ignore; pay little or no attention to  |  
 negligence  | n. 疏忽,没能尽力的 neglect; failure to take reasonable care; state or quality of being negligent  |  
 negligent  | a. 疏忽的,粗心大意的 failing to be careful enough or to give enough attention to your responsibilities; inattentive  |  
 negotiable  | a. 可商量的,(支票)可兑现的 capable of being negotiated; transferable by assignment or endorsement to another person  |  
 negotiation  | n. 商议,谈判 discussion intended to produce an agreement  |  
 nervous  | a. 神经的,神经紧张的,易激动的 agitated; worried and anxious  |  
 neurotic  | a. 神经病患者 of or about the nerves; seated in the nerves; nervous  |  
 neutral  | a. 中型的,自然的,中庸的,公允的 impartial; not supporting one side over another  |  
 neutralize  | v. 抵消,中和 make neutral and thus inoffensive  |  
 neutron  | n. 中子 an elementary particle with 0 charges and mass about equal to a proton  |  
 nevertheless  | ad. 尽管如此,不过,可是,然而 not the less; notwithstanding; despite that; yet  |  
 nibble  | v. 一点点地咬,慢慢啃 bite by little at a time; seize gently with the mouth; eat slowly or in small bits  |  
 nobility  | n. 贵族,高贵的身份,高贵 quality or state of being noble; the superiority of mind or character; commanding excellence; eminence  |  
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