重点单词详析：
（1）attack
【原句回放】
It often gets angry and will attack anyone who goes clo to it.
它常变得很生气并攻击靠近它的人。
【点拨】
attack vt. 攻击；进攻；侵袭；n. 攻击；进攻； (疾病等) 发作；着手
attack sb. for sth. 由于某事而责难某人
attack sb. with sth. 用……攻击某人
attack 向……攻击
be attacked with a dia 患病
launch/make an attack 对……发动进攻
under attack受到攻击
a heart attack心脏病发作
We attacked the enemy at dawn.在黎明时我们进攻敌人。
The soldiers made a strong attack on the enemy.战士们向敌人发起猛烈进攻。
The city came under attack during the night.城市在夜晚遭到攻击。
As far as I know, he died becau of a heart attack.据我所知，他死于心脏病发作。
【拓展】attacker n. 攻击者
（2）sharp
【原句回放】
the sharp nails that some animals and birds have on their feet
一些动物和鸟的脚上有尖锐的趾甲
【点拨】
sharp adj. 锋利的；尖的；陡的，急转的；轮廓鲜明的；明显的；（感觉、味道）强烈的，辛辣的；刺耳的，刺骨的; adv. 猛烈地；尖锐地；尖利地；准时地
I dislike the man; he has such a sharp tongue. 我不喜欢这个人，他爱说刻薄挖苦的话。
They started an attack against each other with sharp words. 他们开始用激烈的言语相互抨击。
He butchered the pig with a small sharp knife. 他用一把锋利的小刀杀猪。
The snow-capped mountains stood out in sharp relief against the blue sky.
白雪皑皑的山峦与蓝天形成了鲜明对比。
She planned to unlock the store at 8.00 sharp this morning.
她打算今天早上 8 点整准时开门营业。
（3）claim
【原句回放】
Although no one really got a clear look at the mysterious creature, Xue Junlin, a local photographer, claimed that its head looked like a hor.
【点拨】
claim v. 声称；主张；要求；索赔；n .断言；权利；要求权；所有权
claim to do sth./ 声称/主张做……
It is 有人主张……
claim sth. from sb. for sth. 因为……向某人索要……赔偿金
lay claim to 宣称……应归其所有；认领……
make a claim for sth. 要求
It is claimed that some teachers in our school are working 90 hours a week.
据说我们学校有些老师每周工作90小时。
He claimed to have en the Mona Lisa.＝He claimed that he had en the Mona Lisa.
他宣称他看过《蒙娜丽莎》那幅画。
He claimed that he had done the work without help.他声称未得到帮助就完成了此项工作。
They made a claim for higher pay.他们要求提高薪水。
（4）calm
【原句回放】
Mr Li Xiaohe said that his family were able to e the monster clearly becau the weather was fine and the lake was calm.
李小和先生说他和家人看清楚了怪物，因为当时天气好，湖水平静。
【点拨】
calm vt.(使)平静，镇定；adj.平静的，沉着的
calm onelf 平静下来
calm down (使)安静下来
keep calm 保持冷静
He took a deep breath to calm himlf.他深吸一口气使自己平静下来。
We tried to calm him down, but he kept shouting and crying.
我们试图使他安静下来，但是他仍然不停地叫喊着。
Calm down. There is nothing to worry about!安静下来吧，没有什么可担忧的。
You’d better keep calm in face of danger.面对危险你最好保持冷静。
【拓展】辨析：calm，quiet，still与silent
calm：平静的，沉着的，指无风浪或人的心情不激动。
That was a calm day.那是个无风的(平静的)日子。
quiet：安静的，宁静的；指没有声音，不吵闹或心里没有烦恼焦虑。
Ask the children to keep quiet.让孩子们安静。
still：不动的，静止的，指没有运动或动作的状态。
The officer asked the Swede to keep still.军官叫那个瑞典人别动。
silent：寂静的，沉默的，不发音的，指没有声音或不讲话。
She kept silent about the matter.她对此事保持沉默。
（5）exist
【原句回放】
something that continues to exist after death 在死后仍存在的某物
【点拨】
exist vi. 存在；实有；生存
exist in在于……
exist on＝live on 靠……生存
One cannot exist without air.人没有空气就不能生存。
I can hardly exist on the wage I’m getting; there is no money for luxuries.
我靠我挣的工资简直难以糊口，根本无钱享受。
【拓展】
existence n. 存在；实有；生活；生活方式
come into existence 出现；产生
bring sth. into existence 使某物出现、产生
in existence存在
Scientists have many theories about how the univer first came into existence.
关于宇宙最初是如何产生的，科学家们有许多种理论。
（6）adapt
【原句回放】
If you adapt to something, you can change in order to make the situation better.
如果你能适应某事，你就能为了环境的更加美好而改变自己。
【拓展】
adapt v. (使)适应；改编
adapt onelf to 使自己适应……
adapt to 适应
根据……改写，改编
be 为……改编/写；被改编成
be 根据……改编
Children adapt quickly to new surroundings.儿童能很快适应新环境。
It is hard to adapt this story for the film.要将这小说改编成电影很困难。
The film is adapted from a novel.这部电影由一部小说改编而成。
（7）cover
【原句回放】
It is 2,189 metres high and covers an area of about ten square kilometers.
天池海拔2,189米，面积大约有10平方公里。
【点拨】
cover vt. 有(多大面积)，占地……；采访；覆盖；走完(一段路程)；看完(若干页书)
Our college covers an area of 1,000 mu.我们的大学占地1,000亩。
Many journalists were nt to cover the medical conference.许多记者被派去采访医学大会。
The mountain was covered with snow all the year round.山上终年积雪。
The Red Army covered 25,000 li on the Long March.红军长征时走了二万五千里。
How many pages have you covered？你读了多少页？
（8）indicate
【原句回放】
However, across the border in Wales, the red dragon which appears on the Welsh flag is a positive symbol, indicating strength and a n of national identity.
