Unit6（第17讲—第19讲）

　　Text A  Diamonds

　　本课主要单词

　　1. rare  adj. 稀有的，难得的

　　These animals are so rare that I would do whatever I can to save them.〔这些动物很稀有，我会尽我所能去保护它们。〕

　　On the rare occasions when the old lady had any post， the little boy downstairs would go and get it for her.〔老太太难得有信，只要有信总是楼下的小男孩帮她去拿。〕

　　Snow is rare in this part of China.〔中国的这个地区难得下雪。〕.

　　It is very rare for him to say “Sorry” to any others.〔他难得会对任何人说“对不起”。〕

　　Believe it or not， she is a rare beauty.〔信不信由你，她是一个百里挑一的美人。〕

　　a rare word〔冷僻的词〕　  　rare metals〔稀有金属〕

　　a rare disease（罕见的疾病）　　a rare medicinal herb〔珍奇药草〕.

　　2. substance n. 物质；实质；大意；根据

　　They were trying to remove harmful substances from the soil.〔他们正设法去除土壤里的有害物质。〕

　　Ice， snow and water are the same substance in different forms.〔冰、雪、水是同一物质的三种不同形式。〕

　　What was the point of going to a lecture with little substance？〔去听一个没有什么内容的讲座有什么意义呢？〕

　　What he is saying in substance is that we should take effective measures to prevent pollution.〔他大体上说的是我们应该采取有效措施防止污染。〕

　　There was no substance in his complaints.〔他的抱怨没有道理。〕

　　3. slight adj. 轻微的；纤细的

　　Mother said she had a slight headache.〔妈妈说她有点头疼。〕

　　I didn't have the slightest idea about what had happened.〔我一点都不知道发生了什么事。〕

　　His chances of winning the election are very slight.〔他在选举中获胜的可能性极小。〕

　　He is too slight to play football.〔他太纤细，不能踢足球。〕

　　4. extreme adj. 极端的，极度的；尽头的　　　　n. 极端

　　He died in extreme poverty.〔他在极度贫困中死去。〕

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