【句子】
Because its leaves remain green long after being picked, rosemary became aociated with the idea ofremembrance.
采摘下的迷迭香树叶常绿不衰，因此人们把迷迭香树与怀念联系在一起。 【解析】
1.remain
1)vi.剩下/残存：remain (+ 介宾/副词)，此时不能用进行时态，也没有被动语态
After the fire, very little remained of his house.火灾过后，他的家所剩无几。 2)vi.逗留/停留：remain (+ 介宾/副词) Only a few students remained in the claroom just now.现在只有几个学生还在教室。 3) vi.依旧/仍然: remain + 形容词/名词 It remained a secret.这仍然是个秘密。
4) vi.留待/尚待：此时它有两个固定句型如下： 固定句型一：sth/sb remain to be + 过去分词 固定句型二：It remain to be seen + whether引导的主语从句
Many problems remain to be solved.有好多问题尚待解决。
It remains to be seen whether you are right.你是否正确，以后见分晓。
5)remaining除了是remain的现在分词/动名词形式外，还可以单独做形容词，意思是“剩下的”
I bought a gift for her with the remaining money.我用剩余的钱给她买了一件礼物。 2.keep,remain,stay辨析
1)表示“继续呆在某处”时，应该用不及物动词remain或stay
①Stay indoors for a few days until you recover from your cold.
②He remained in his seat after all the other
students had gone home.
2)表示“暂住、短期停留”时，只能用不及物动词stay ①He is staying at Hilton Hotel.
②My mother-in-law stayed with us this week when she visited us.
3)表示“残留、剩下”时，只能用不及物动词remain
①Not much of the house remained after the fire.②Of the seven brothers, only four now remain; the rest are dead.
4)表示“继续保持或处于某种状态”时，应视具体情况在上述动词中进行选择
①表示“继续保持或处于原来的状态”时，可用remain或stay
The door stayed closed.But the police themselves prefer to stay unarmed.
②表示“需要设法才能保持或处于某种状态”时，应
用keep
Although they have many difficulties, they keep happy.
③表示“使某人或某物保持某种状态”时，只能用及物动词keep
Why do you always keep your windows closed? 3.rosemary
迷迭香（灌木，叶子窄小，气味芬芳，可用于烹调） If someone suffers from epilepsy, it wouldnt be safe to use rosemary oil, says Jan 简说:“如果某人患有癫痫，使用迷迭香油就不安全。” 4.aociate vt.联想，联合 n.伙伴，同事，同伴 adj.副的，共事的，有联系的 n.准学士学位获得者 vi.交往
①I don\'t want to aociate myself with them any more.我不愿再和他们交往了。
②I got a new job and a new set of work aociations.我有了新工作和一班新同事。
5.remembrance n.回想，记忆，纪念品 ①In remembrance of the battle, we set up a museum.为纪念那次战役，我们建立了一座博物馆。 ②Something given as a token of love, affection, or remembrance.信物，纪念品作为爱、喜爱或纪念的一种标志
【练习】
Ladies and gentlemen.Please remain____until the plane has come to a complete stop.(2009年四川卷) A.seated B.seating C.to seat D.seat 【句子】
Although apparently rigid, bones exhibit a degree of elasticity that enables
the skeleton to withstand considerable impact.
骨头看起来是脆硬的，但它也有一定的弹性，使得骨骼能够承受相当的打击。 【解析】
1.rigid adj.坚硬的，严格的，固执的，僵硬的，刻板的
①Beliefs have oified into rigid dogma.信仰已僵化为不可更动的教条。 ②He\'s very rigid in his ideas.他的想法非常固执。 2.exhibit
1)v.展览，陈列，展示，表现
Rolled up his sleeve to exhibit the scar.卷起袖子来显示露出伤疤 2)n.展品，展览
I find some of the exhibit fine in quality and beautiful in design.
我发现有些展品质量优良，设计美观。
3)exhibition，exhibit，show，exposition，fair，display辨析
这些名词都可表示“展览”或“展览会”之意。
exhibition:一般指较正规的展览会。
exhibit:多指个人或团体陈列的展览品，规模可大可小。
show:指艺术品、农产品、工业品或商品等的任何形式的公开展览。
exposition:多指大型博览会或国际博览会。 fair:侧重指为促销商品而举办的展览会或商品交易会。
display:指展销会，商店橱窗或柜台上的陈列品。 3.elasticity n.弹力，弹性，伸缩性，灵活性 Having or exhibiting no elasticity.无弹性的无弹性的或显示出没有弹性的
4.skeleton n.骨架，纲要，骨骼，骨瘦如柴的人或动物，家丑
①The shell of a snail is its skeleton.蜗牛的壳是它的骨骼。
②She told me about the skeleton of her new novel.她把自己一部新小说的梗概对我讲了一遍。
5.considerable,considerate的区别和用法 considerable, considerate这是一对形近易混的形容词。
1)considerablea.相当大的，相当多的；值得考虑的
That family owns a considerable amount of land.那个家族拥有大量的土地
2)consideratea.考虑周到的，体贴的，后面常跟of结构
He is always considerate of others; he is kind and sympathetic.他总是很体谅别人，他很慈善并且富有同情心 【练习】
She has lost her handbag with the ______ sum of ＄200 in it.A extraordinary B important C considerable D valuable
【句子】
That xenon could not form chemical
compounds was once believed by scientists.科学家曾相信：氙气是不能形成化合物的。 【解析】 1.form
1)n.形式，形状，表格，良好的健康状态，表现状态，常规
①The team were on excellent form throughout the whole competition.
这个队在整个比赛过程中一直处於极好的竞技状态。
②I\'ve got no record of this horse\'s form.
我没有这匹马的情况记录。 2)v.形成，建立
His research formed the basis of his new book.
他的研究成果是他这本新书的基础。 2.once
1) once用作连词时，意为“一旦……就……”，用于连接时间状语从句，相当于as soon as。 如：
Once you start, you will never give up.
一旦你开始了，你就不要放弃。
注意：
once引导的是时间状语从句，从句要用一般现在时代替将来时。
2) once用作副词时，意为“曾经；一度；从前”。它是一个不确定的时间副词，其位置一般是在行为动词之前，系动词之后。 Once he lived in America, but now he lives in England.他曾经生活在美国，但现在他生活在英国。
3) once用作副词，也可意为“一次”的意思。两次是“twice”，三次是“three times”，四次是“four times”。
The old profeor comes to see us once a week.那个老教授一周来看我们一次。
4)注意once用作副词时，在句中的位置不同表示的意思也不同，所以要特别注意。
I once went to Shanghai.我曾经去过上海。
I went to Shanghai once.我去过上海一次。 4)once构成的一些短语的用法： （1）at once（立刻；马上） （2）once again（再一次；又一次） （3）once in a while（偶尔；间或）
（4）all at once（突然），相当于suddenly。 （5）once upon a time（很早以前；从前） 【练习】
The research is so designed that once _____ nothing can be done to change it.A.begins B.having begun C.beginning D.begun
【句子】
Studies of the gravity field of the Earth indicate that its crust and mantle yield when unusual weight is placed on them.
对地球引力的研究表明，在不寻常的负荷之下地壳和地幔会发生位移。 【解析】 1.field
1)n.田地，领域，运动场，场地，田野，JAVA中的范畴
They rode through forests and fields.
他们骑马穿过森林和原野。 2)adj.田间的，野外的
Many farmers are working in the fields.许多农民在田里干活。
2.indicate
1)v.指示，象征，显示
Don\'t forget to indicate before turning.拐弯之前别忘记指示车行方向。 2)v.表明，指明
Research indicates that men find it easier to give up smoking than women.
研究表明，男人比女人更容易戒烟。 3.yield
1)v.生产，获利，屈服，弯下去 His busine yields big profits.他的生意带来巨大的利润。 2)n.投资收益，生产量 These trees gave a high yield of fruit this year.
这些果树今年获得了大丰收。 【练习】
I don\'t think your proposal is quite ____, and I suggest you give me a new piece tomorrow.A.in place B.out of place C.in its place D.take the place 【句子】
The annual worth of Utah’s manufacturing is greater than that of its mining and farming combined.尤它州制造业的年产值大于其工业和农业的总和。 【解析】 1.manufacturing 1)n.制造业
The peasant workers mainly work in the manufacturing industry.农民工主要在制造业工作。 2)adj.制造业的
Manufacturing output has increased by 8%.工业产量增长了 8%。 2.mining 1)n.采矿；矿业
He was trained there as a mining engineer.他在那里被培养成一名采矿工程师。 2)短语词组
advance mining 前进式开采
data mining 数据挖掘技术...data mining software 数据筛选软件...drift mining 浅矿床开采 mining engineer 采矿工程师
mining engineering 采矿工程 mining explosive 矿用炸药
mining industry 采矿业 mining machinery 采矿机械。 3.combined
adj.组合的；结合的
How these elements are combined is clearly known to us.这些元素是怎样结合的我们知道得很清楚。 【练习】【句子】
Quails typically have short rounded wings that enable them to spring into full
flight instantly when disturbedin their hiding places.
典型的鹌鹑都长有短而圆的翅膀，凭此他们可以在受惊时一跃而起，飞离它们的躲藏地。 【解析】
1.typically（常见词汇） 1)adv.典型地；代表性地；通常
Typically, he would come in late and then say that he had to go early.
他一向是来得很晚，然后又总说他得早走。 2.spring（必须掌握词汇）
1)n.春天；春季；弹簧；弹力；跳；泉水；源头 It can be quite windy there, especially in spring.那里有时容易刮风,特别在春季。
2)v.跳；弹；快速站起；突然提出；触发捕捉器；(使)裂开；爆炸；释放；涌出；生长；出现；耸立；(风)开始吹
I hate to spring this on you at such short notice.很抱歉，向你突如其来提出这件事。 2)jump,leap,spring,hop,bound,skip辨析 jump: 是普通用词，指用双脚向上跳，向下跳，或在同一平面上跳到有一定距离的某一点上，或跳过。leap: 常可与jump换用，但侧重身体猛力向上升起
并朝前急冲的动作，有时含突然的意味。 spring: 更强调有力和弹跳的运动。
hop: 指单脚短跳或双足猛力的动作。也指小鸟、青蛙等的跳。
bound: 多指向前向上或向下跳跃、奔跳。
skip: 指两脚交替轻轻地跳或跨的动作。 3.instantly（常见词汇） 1)adv.立即地；即刻地
The poor girl was dismied instantly.这个可怜的姑娘被当即解雇。 A.discourage B.decrease C.disturb D.disgust
Succe was achieved by the ______ efforts of the whole team
A.combine B.combined C.combining D.being 2) immediately,instantly,presently,directly,shortly,soon,at once,right away辨析
immediately: 指做完一件事后，立即就做另一件事，中间一般没有明显的时间间隔。
instantly: 指恰恰就在此刻，一秒钟也没耽误。 presently: 指不久、即将。
directly: 和immediately同义，指毫无迟疑。 shortly: 和soon同义，指动作发生或完成的速度之快。
soon: 常用词，指行动快，完成速度快。 at once: 口语中常用，语气强烈，指时间紧迫，一刻也不能耽误。
right away: 主要用于美国英语，语气稍弱于at once，强调动作迅速。 4.disturb（常见词汇）
1)v.扰乱；妨碍；使 ...不安；打破...的平静；打乱...的治安
They took the phone off the hook so no calls would disturb them.他们摘下电话听筒，以免电话打扰他们。 【练习】
High interest rates _____ people from borrowing money.
combined
