1.negligence n．疏忽，粗心大意(carelessness)

词根记忆：来自negligent(a．忽略的：疏忽的)

例:If the insurance company is able to prove excessive loss due to owner's negligence, it may decline to pay the money.

派生词：negligible(a．可忽略不计的)

2.negligible a．可忽略不计的（so small or unimportant or of so little consequence as to warrant little or no attention）；微不足道的（trifling）

例：Inflation in the intervening period has been negligible, and the increase has been duly received by all eligible Runagians.

同根词：neglect(v.疏忽；忽视)

3.negotiate v．(with)谈判；（通过谈判或协商）达成协议(to arrange or settle by discussion and mutual agreement)

联想记忆：ne+got(获得)+iate--谈判是为了获得一致意见--谈判

例:It is against the police department's policy to negotiate with kidnappers.//They gathered workers for particular jobs and then negotiated a contract between workers and employers.

派生词：negotiation(n．谈判，协商)

4.negotiation n．谈判：协商（the action or process of negotiating or being negotiated）

词根记忆：来自negotiate(矿商议，谈判)

例：The methods of negotiation are available to the purchasing company.

同根词：negotiable(a．可协商的)

5.nematode n．线虫类(any of a phylum, Nematoda or Nemata of elongated cylindrical worms parasitic in animals or plants or free-living in soil or water)

例：The nematodes can lie dormant for several years in their cysts(包囊).

6.neural a．神经（系统）的（of relating to．or affecting a nerve or the nervous system）

词根记忆：neur(神经)+al--神经的

例：This drug will damage neural connections in rats.

派生词：neurotransmitter(n．【生】神经传递素)

7.neuron n.神经元，神经细胞(a grayish or reddish granular cell with specialized processes that is the fundamental functional unit of nervous tissue)

词根记忆：neur(神经)+on(物)--神经元

例：Neurotransmitters are chemicals that carry nerve impulses from one neuron to the next.

派生词：neuronal(a神经元的)

8.neutral a．中立的( not engaged on either side)

词根记忆：neutr(中)+al--中间的;中立的

例：Switzerland remained neutral during World War l l.

派生词：neutrality(n.中性;中立)

9.neutron n.中子

词根记忆：neutr(中)+on(物)--中子

例：neutron star中子星（假想天体，主要是由高密度中子组成，具有强大的吸力）

同根词：neutrino(n．中微子)