Unit 4 Amazing Science 
Topic 1 When was it invented?
【重点单词】
1.rocket /ˈrɒkɪt/ n. 火箭
2.metal /ˈmetl/ n. 金属
3.satellite /ˈsætəlaɪt/ n. 卫星
4.spaceship /ˈspeɪsʃɪp/ n. 宇宙飞船
5.lock /lɒk/ n. 锁 v. (用锁)锁上,被锁住
6.laptop /ˈlæptɒp/ n. 手提电脑
7.digital /ˈdɪdʒɪtl/ adj. 数码的,数字的
8.bulb /bʌlb/ n. 电灯泡
9.airplane /ˈeəpleɪn/ n. 飞机
10.hard-wearing adj. 耐磨的
11.Korea /kə'rɪə/ n. 韩国;朝鲜
12.invention /ɪnˈvenʃn/ n. 发明, 创造
13.list /lɪst/ v. 列清单,把……列表 n. 名单;目录;清单
14.crayon /ˈkreɪən/ n. 彩色铅笔(粉笔、蜡笔等)
15.thought /θɔːt/ n. 想法,看法,主意
16.brainstorm /ˈbreɪnstɔːm/ v. 集思广益,动脑筋
17.evaluate /ɪˈvæljueɪt/ v. 估值,评价,评估
18.detailed /ˈdiːteɪld/ adj. 详细的
19.redesign /ˌriːdɪˈzaɪn/ v. 重新设计
20.imagination /ɪˌmædʒɪˈneɪʃn/ n. 想象力;想象
21.balloon /bəˈluːn/ n. 气球;热气球
22.gun /ɡʌn / n. 枪,炮
23.robot /ˈrəʊbɒt / n. 机器人
24.keyboard /ˈkiːbɔːd/ n. 键盘
25.explorer /ɪkˈsplɔːrə(r)/ n. 探险者,勘探者
26.mark /mɑːk/ n. 标示;记号;符号 v. 做标记,做记号
27.system /ˈsɪstəm/ n. 体系,方法,制度
28.man-made adj. 人造的;非天然的
【重点短语】
1.be (not) allowed to do sth. (不)被允许做某事
2.spend time on sth. 把时间花在某物身上
3.be made of 由……制成
4.be made from 由……制成(看不出原材料)
5.be used for doing sth 被用来做某事
6.send...into... 把……送入……
7.some day 将来有一天
8.come true 实现
9.lock the door 锁门
10.more than 超过
11.in many ways 在许多方面
12.make a model 制作模型
13.do research 做研究
14.come to the idea 想到这个主意
15.look like 看起来像……
16.as long as 只要
【重点句型】
1.It’s bad for your health if you spend too much time on them.
如果你花太多时间在它们身上,对你的健康有害。
2.It’s made of medal.
它是由金属制成的。
3.It’s used for sending satellites or spaceships into space.
它被用来发射卫星或宇宙飞船进入太空。
4.I wish I could go into the space some day.
我希望有一天我能进入太空。
5.I hope your dream will come true.
我希望你的梦想会成真。
6.It’s said that he invented morn than two thousand things during his life.
据说他一生中发明了两千多种东西。
7.You can have wild and crazy thoughts.
你可以有疯狂的想法。
8.Make a detailed drawing of your invention so others will understand how your invention works.
为你的发明画一张详细的图,这样别人就会明白你的发明是如何工作的。
9.Using the stars, they could find out where they were and in which direction they were going.
通过星星,他们可以知道自己在哪里,往哪个方向走。
10.This method worked well at night as long as the weather was good and the stars could be seen.
只要晚上天气好,能看到星星,这种方法就很有效。
11.We can use it at any time, in any place and in any weather to find out our position.
我们可以在任何时间、任何地点、任何天气使用它来找出我们的位置。
12.The GPS is a great invention that helps us explore our planet and discover where we are.
GPS是一项伟大的发明,它帮助我们探索我们的星球,并发现我们在哪里。