A blast of cold air sent a shiver all over his body.〔一股冷气使他浑身战栗。〕
Furious blasts of thunder frightened everybody.〔一阵阵的霹雳炸雷吓坏了所有些人。〕
The driver blasted the horn continuously.〔司机不停地按喇叭。〕
Rock music blasted from the hall and the whole building seemed to be shaking.
〔震天的摇滚乐从客厅传来，整座房屋好像都在摇动。〕
They decided1 to blast through the mountains. 〔他们计划炸山开路。〕
16.crush v. 压碎；镇压，压倒
The machine can crush rocks into powder.〔那台机器能把石头碾成粉末。〕
You must remember poverty should not crush one's spirit.〔你需要记住不应该因贫困而意志消沉。〕
We didn't expect that they would crush us into this tiny room.
〔大家没料到他们会让大家挤在这个小房间里。〕
Can you imagine that debts are crushing them？〔你能想像到债务正压得他们喘不过气来吗？〕
17. destroy v. 破坏，毁灭；消灭
Several buildings were destroyed by the bomb.〔几座建筑物都被炸弹炸毁了。〕
He destroyed the letter as soon as he had read it.〔他一读完就把信毁了。〕
I really don't want to destroy the friendship between us.〔我真不想毁坏大家之间的友谊。〕
The loss of his wife and son finally destroyed him.〔失去妻儿最后击败了他。〕
This poison can destroy rats.〔这种毒药可灭鼠。〕
18. impressive adj.给人深刻印象的，感人的
impression n. 印象
impress v. 给极深的印象
She is trying to build an impressive international reputation.〔她正努力打造让人难忘的国际声誉。〕
She said that all the places she had visited in China were impressive.
〔她说她所游览过的中国的每个地方都给她留下了深刻的印象。〕
What are your impressions of Beijing？〔你对北京有什么观感？〕
I had the impression that he was a teacher.〔我记得他仿佛是个老师。〕
What impressed me most were the great changes in this city.〔给我印象最深的是这座城市的巨大变化。〕
She wants to impress her new boss with her diligence.（她想以勤奋加深老板对她的印象。）
19. experience n 经验；历程v. 历程，遭受
experienced adj. 有经验的
With no teaching experience my chances of getting the job are slight.
〔我没教学经验，得到这份工作的可能性非常小。〕
He is a man of rich experience.〔他是一个资深的人。〕
Everyone can learn a lot from his own experience.〔每个人都从我们的历程中学到不少东西。〕
His experience in the country could be used as material for his writing.
〔他在农村的历程可以作为他的写作素材。〕
He experienced a lot of hardships when he was abroad.〔他在海外时历程了很多艰辛。〕
We need someone more experienced to help us.〔大家需要更有经验的人来帮助大家。〕
He is more experienced than I am in planting trees.〔在植树方面他比我有经验。〕
20. immediately adv. 即刻地；紧密地
immediate2 adj. 立刻的；最接近的
He said he had to go to the hospital immediately.〔他说他得立即去医院。〕
She finished one cup of coffee and asked for another immediately.〔她喝完一杯咖啡立刻又要了一杯。〕
The post office is immediately next to the bank.〔邮局紧挨着银行。〕
You have to give them an immediate reply.〔你得立刻回话他们。〕
It is necessary that you get the support from your immediate superior.〔你需要得到顶头上司的支持。〕
本课主要构词法
affixation3（词缀法）
1.形容词后缀 -fulbeautiful，useful，
2.形容词后缀 -iveimpressive
3.形容词后缀 -y greasy4
4.名词后缀 -ationcombination，formation
5.名词后缀 -ure pressure
6.名词后缀 -y discovery
7.名词后缀 -er traveler，miner
8.名词后缀 -ful handful
9.副词后缀 -ly finally，probably，immediately，carefully，
10.副词后缀 -ward upward
课文介绍
本课主要介绍了钻石的特质、形成、分布与开采方法。读了本课，你会知道钻石的形成与数百万年前的地壳运动有关；你也会知道深受上至达官贵人下至普通百姓喜欢的恒久远的钻石在刚开采出来时并不光彩照人。
本课语言点
1. They are the hardest substance found in nature.
本句中found in nature是定语从句，修饰substance.定语从句中省略了that are.这种省略现象在定语从句中非常容易见到，在前几个单元中，大家遇见过多次。请看下面的句子：
1） There are many books （that） I'd like to read. （有不少书我想看。）
2） He is a man （that） we all like and trust. （他是一个大家大伙喜欢和信任的人。）
3） This is the most interesting film （that） I have ever seen. （这是我看过的最有意思的电影）
先行词的前面有形容词最高级时，定语从句需要用that引导，而不需要which.请看下面的句子：
1） This is the most beautiful place （that） I have ever visited. （这是我游览过的最漂亮的地方。）
2） This is the most serious problem （that） we have ever met. （这是大家遇见过的最紧急的问题。）
3） They are the richest people （that are） living in this area. （他们是住在这一区域的最富有些人。）
本句中的hardest意思为坚硬的坚固的，而不是困难的。请看下面的句子：
1） This nut is as hard as rock. （这果子硬得像岩石。）
2） He found it hard to make friends. （他感觉交朋友非常困难。）
2. That means a diamond can cut any other surface. And only another diamond can make a slight cut in a diamond.
mean是一个非常容易见到的词，本句中的意思是意味着。mean还有意欲，企图，计划的意思。请看下面的句子，注意mean在各句中的意思和使用方法：
1） What do you mean by saying this to me？ （你对我说这个的意思是？）
2） Friendship means everything to him. （友谊对他来讲意味着所有。）
3） The teacher's praise meant so much to the children. （老师的表彰对孩子们来讲非常重要。）
4） I'm serious about this. I mean what I say. （我对此事是认真的，我说话算数。）
5） I'm sorry， I didnt mean to hurt you. （对不起，我无意伤害你。）
6） They meant to finish the work ahead of time. （他们的计划是提前完成这项工作。）
7） I meant to call you but I forgot. （我原计划给你打电话的，但我忘记了。）
cut在前一个句子中做动词用，意思是切割，在后一个句子中做名词用，意思是切面。
1） Who will cut the ribbon for the exhibition？ （哪个将为展览会剪彩？）
2） I am going to have my hair cut today. （今天我要去理发。）
3） The icy wind cut him to the bone. （他感到寒风刺骨。）
4） The old man is cutting a figure in stone. （那位老人正在雕刻石像。）
5） I had some cuts and bruises5 on my arms， but I'm ok. （我的臂上有的伤口和擦伤，但我没那些问题。）
6） He made a smooth cut on the marble. （他在大理石上留下一个光滑的切面。）
