9196.naive(形)轻信的；天真的、幼稚的
同义词innocent
Modern readers whould find such naive solutions totally unacceptable.
现在的读者们全然不能接受这样天真的解决办法。

9197.nature(名)天性、性质、本质
不可数
The nature of iron differs greatly from that of wood.
铁与木的性质有很大区别。

9198.navigate(动)航行于；驾驶
同义词steer
The large ship could not navigate the river．
那艘大轮船不能在河里航行。

9199.negligible(形)可以忽略的、无关紧要的；微不足道的
I don't see any grounds for you to crow your heads off like that when the achievement in your studies is negligible.
我认为你在学习上取得的进步是微不足道的，没有任何理由值得这样大吹大擂。

9200.negotiate(动)谈判、协商
They have signaled their willingness to negotiate．
他们已经表示他们愿意谈判。

9201.neighborhood(名)邻近地区
I'm really familiar with this neighborhood．
我对这一带熟得很。

9202.network(名)广播网、电视网；广播（或电视）联播公司
The President's speech was broadcast on a national television network.
总统演说由全国电视网联播。

9203.newsreader(名)新闻报道员
"I must apologize for this frog in my throat." a BBC newsreader said.
“很抱歉，我声音有点沙哑。”英国广播公司的新闻播音员说。

9204.newsworthy(形)有报导价值的
This is a photography of newsworthy events.
这是有新闻价值的摄影事件报导。

9205.nominate(动)提名
The President nominated him Ambassador to Russia．
总统提名他担任驻俄罗斯大使。

9206.norm(名)基准、规范
The output from this factory is well above the norm for the industry.
这个厂的产量远远高于同行业的正常标准。

9207.notorious(形)声明狼藉的、恶名昭彰的
同义词infamous
He changed his name in order to avoid confusion with the notorious outlaw.
他改变他的名字为了避免与声名狼籍的歹徒相互混淆。

9208.nurture(名)养育；环境因素
They debated whether nature or nurture is more important.
他们为是天性还是后天环境较重要而争论。

9209.nutrient(名)营养物、滋养物
This soil contains valuable nutrients．
这种土壤含有宝贵的养分。

9210.nutrition(名)营养；营养学
不可数
Because of his poor nutrition, he has grown weaker and weaker.
他因为营养不良，身体越来越虚弱了。

9211.obese(形)肥胖的、过胖的
An averagely obese person's lifespan is shortened by around nine years while a severely obese person by many more.
一个中等肥胖者的寿命比普通人约短9年，而一严重肥胖者受到的影响更大。

9212.oblivious(形)不注意的；健忘的
They were oblivious to what was going on around them.
他们没有注意到周围发生的事。

9213.obscure(形)模糊的、难解的
同义词blurred
Is the meaning still obscure to you?
你觉得意思仍然不清楚吗？

9214.obsolete(形)废弃的；过时的
The horse-drawn plough is now obsolele in most European cuntries．
马拉的犁在欧洲多数国家均已不再使用了。

9215.obstinate(形)顽强的、不屈服的
Do not worry about his obstinate refusal to cooperate; He'll come to himself before long.
别担心他现在不肯合作，很快他就会恢复理智的。

9216.ccupation(名)工作、职业
同义词vocation
The secretary asked what my occupation was．
书记问我的职业是什么。

9217.off(形)状况不好的；食物腐败的
The tea has gone off.
这茶已经变质了。

9218.official(形)官方的；公务上的
The President's official include being Commander in Chief.
总统的职责包括担任总司令。

9219.offshore(形)近海的：离岸的
They piped oil into storage tanks from ships anchored offshore．
他们从停靠在后海处的船上以管道输送油于贮藏箱内。

9220.ominous(形)不祥的、不吉利的
同义词sinister
It's an ominous warming to break something.
打破东西是个不祥的预兆。

9221.opera(名)歌剧；歌剧院
The Ovate Garden Opera plays in the Royal Opera House．
卡文特花园歌剧团在皇家歌剧院演出。

9222.operator(名)接线生
Operator picks up the line from Tom.
接线生接起汤姆的电话。

9223.optimistic(形)乐观的
反义词pessimistic
Judy is very optimistic that things are taking a good turn．
茱蒂很乐观，因为情况正在好转。

9224.orchard(名)果树园、果树林
I caught the boy stealing fruit from our orchard.
我逮到了那个在我们果园里偷水果的男孩。

9225.orchestra(名)管弦乐队
The orchestra director has made preparation.
管弦乐队指挥巳做好了准备。

9226.organ(名)器官
The heart is a highly contractile organ.
心脏是具有高度收缩性的器官。

9227.organism(名)生物、有机体
The organism develops from a zygote.
生物是由受精卵发育而威的。