Unit 4 Astronomy: the science of the stars

单元要点预览（旨在让同学整体了解本单元要点）

词汇

部分 词语

辨析 1. loudly / loud / aloud 2. unlike / dislike 3. remain / leave

4. climate / weather 5. now that / since / because / as 词形

变化 1. violent adj.强暴的，猛烈的 violence n.暴力，强暴；猛烈 violently adv. 强暴地；猛烈地 2. fundamental adj.基本(础)的n.[pl.]基本原则(法则) fundamentally adv. 基本地；根本地 fundament n. 基础；根本 3. development n.生长，发

展；新情况 develop vt.发展；产生

vi.生长；发展 developed adj. 发达的developing adj. 发展的 4. lay vt.放下；摆设；产(蛋) lay---laid---laid---laying lie vi. 躺，平放；位于

lie---lay---lain---lying lie n.&vi. 谎话；说谎

lie---lied---lied---lying 5. prevent vt. 预防，防止 prevention n.预防；阻止；妨碍 preventable adj.可防止的，可预防的 6. gentle adj.和蔼的；轻柔的 gently adv.温和地；静静地 7. physics n.物理，物理学 physicist n.物理学家 physical adj.身体的；物理(学)的；物质的 重点

单词 1. system n.[c] 系统；体系；制度；方法

2. lay vt. (laid, laid, laying) 把......放下；摆设；铺(地毯) ；产(蛋)

3. harmful adj. 有害的；伤害的

4. exist vi. 存在；生存

5. puzzle v.(使)迷惑；(使)苦思 n.谜；难题

6. pull v.拉，拖，拔；移动 n.拉，拖；拉(引)力

7. cheer vt.&vi. (使)高兴、振奋；(对)欢呼 重点

词组 1. to begin with 以......开始；由......作为开头；首先

2. in time 及时；最终；迟早

3. in one' s turn 轮到某人；接着

4. prevent...from 使......不做事；阻止......做某事

5. block out 挡住（光线）

6. be off = set off 出发；动身；不用上班/学/开张

7. break out (灾难、战争等)突发；爆发

8. watch out 密切注视；当心；提防 重点句子 1. It exploded loudly with fire and rock, which were in time to produce the water vapour, carbon dioxide, oxygen, nitrogen and other gases, which were to make the earth' s atmosphere.

2. That made it possible for life to begin to develop.

3. But when I tried to step forward I found I was carried twice as far as on the earth and fell over. 重点语法 宾语从句和表语从句（见语法部分） 语言要点（模块）