z Chapter Two Sensing Technology Chapter Study Tasks(2) In this chapter, you will be able to Get the general idea of remote sensing - Tell the difference between passive and active sensors -Get the general ideas of the texts and extensive -Complete all the practice required Unit4 a part 1 Notes to Text L Part4 Extensive Reading Part 2 Word Study Part5 Notes to Passage Part3 Practice on Text Part6 Practice on Passage 2021/2/20 P1
2021/2/20 P.1 Unit 4 Sensing Technology Chapter Two @ Part 1 Notes to Text & Part4 Extensive Reading & Part 2 Word Study @ Part5 Notes to Passage @ Part3 Practice on Text @ Part6 Practice on Passage Chapter Study Tasks（2） In this chapter, you will be able to —Get the general idea of remote sensing —Tell the difference between passive and active sensors —Get the general ideas of the texts and extensive —Complete all the practice required
a Part 1 Notes to text Sensing Technology A 1) remote sensing:遥感。 遥感泛指从远处探测、感知物体或事物的技术。即不直接接触物体本 身,从远处通过传感器探测和接收来自目标物的信息(如电场、磁 场、电磁波、地震波等信息),通过信息的传输及其处理分析,识 别物体的属性及其分布的特征的技术 2) Passive sensors detect natural energy(radiation) that is emitted or reflected by the object or surrounding area being observed被动传感器可以探测出由处于观察中的物体或区域发射或 反射出来的自然能(辐射)。 注释:自然界中的一切物体,只要温度在绝对温度零度(-27315摄氏 度)以上,都以电磁波的形式时刻不停地向外传送热量,这种传送 能量的方式称为辐射( Radiation)。物体通过辐射所放出的能量, 称为辐射能,简称辐射。所以其实辐射是无处不在的,只是我们平 时感觉不到而忽视了它;该句中的分词短语 being observed用作定 语,修饰 ithe object or surrounding area。 2021/2/20 P2
2021/2/20 P.2 @ Part 1 Notes to Text 1) remote sensing: 遥感。 遥感泛指从远处探测、感知物体或事物的技术。即不直接接触物体本 身，从远处通过传感器探测和接收来自目标物的信息（如电场、磁 场、电磁波、地震波等信息），通过信息的传输及其处理分析，识 别物体的属性及其分布的特征的技术。 2) Passive sensors detect natural energy (radiation) that is emitted or reflected by the object or surrounding area being observed.被动传感器可以探测出由处于观察中的物体或区域发射或 反射出来的自然能（辐射）。 注释：自然界中的一切物体，只要温度在绝对温度零度（－273.15摄氏 度）以上，都以电磁波的形式时刻不停地向外传送热量，这种传送 能量的方式称为辐射（Radiation）。物体通过辐射所放出的能量， 称为辐射能，简称辐射。所以其实辐射是无处不在的，只是我们平 时感觉不到而忽视了它；该句中的分词短语being observed用作定 语，修饰the object or surrounding area。 Sensing Technology
3)The latter, on the other hand, emits energy in order to scan objects and areas whereupon a passive sensor then detects and measures the radiation that is reflected or backscattered from the target.而后者本身散发出来能量,以便对被测物体和区域 进行扫描,这样,被动传感器就能探测和测量出由目标物反射或散发 出来的射线。 注释:主语 The latter指代 active sensors;注意 whereupon是连词, 意为“因此,于是”,引导结果状语从句; that is reflected or backscattered from the target是定语从句,修饰先行词the radiation 2021/2/20 P3 End
2021/2/20 P.3 3) The latter, on the other hand,emits energy in order to scan objects and areas whereupon a passive sensor then detects and measures the radiation that is reflected or backscattered from the target. 而后者本身散发出来能量，以便对被测物体和区域 进行扫描，这样，被动传感器就能探测和测量出由目标物反射或散发 出来的射线。 注释：主语The latter 指代active sensors；注意 whereupon是连词， 意为“因此，于是”，引导结果状语从句；that is reflected or backscattered from the target是定语从句，修饰先行词the radiation. End
L Part 2 Word Study 1. remote sensing遥感 11 emission n.散发,发射 2. acquisition n.取得,获得 12 probe n.探测器探测飞船 3 phenomenon n.现象 13mitv.散发,发射 4. intimate ad亲密的;密切的14 infrared adj红外线的 5. buoy n.浮标,航标 15 radiometer n.辐射仪,辐射计 6. stand- off adj对峙的 16 backscatter v.散射 7. pregnancy n.怀孕 17 deforestation n.砍伐森林 8. ultrasound n.超声波 18 glacier n.冰川,冰河 9. resonance n.共振;共鸣 19 in conjunction with与…协力 10 positron n.正电子,阳电子20 conservation n.保存,保护 2021/2/20 SPaY End
2021/2/20 P.4 End 1. remote sensing 遥感 11.emission n. 散发，发射 2. acquisition n. 取得，获得 12.probe n. 探测器,探测飞船 3. phenomenon n. 现象 13.mit v. 散发，发射 4. intimate adj. 亲密的；密切的 14.infrared adj. 红外线的 5. buoy n. 浮标，航标 15.radiometer n. 辐射仪，辐射计 6. stand-off adj. 对峙的 16.backscatter v. 散射 7. pregnancy n. 怀孕 17.deforestation n. 砍伐森林 8. ultrasound n. 超声波 18.glacier n. 冰川，冰河 9. resonance n. 共振；共鸣 19.in conjunction with 与 … 协力 10.positron n. 正电子，阳电子 20.conservation n. 保存，保护 & Part 2 Word Study
Part3 Practice on Text Task 1: Listening training Dictation of some key words Directions: You will hear some key words twice, most of which are taken from the Word Study. Then finish the Crossword Puzzle. ( See you book p. 2. Dictation of some key expressions Directions: You will hear some key expressions twice, most of which are taken from this text. Then you are asked to complete the missing words )remote sensing 4) passive sensors 2)physical or intimate contact 5) monitor deforestation 3)devices forgathering information 6) land usage and conservation 2021/2/20 P.5
2021/2/20 P.5 Task 1: Listening training Dictation of some key words Directions: You will hear some key words twice, most of which are taken from the Word Study. Then finish the Crossword Puzzle. (See you book p. ) 2. Dictation of some key expressions Directions: You will hear some key expressions twice, most of which are taken from this text. Then you are asked to complete the missing words. @ Part3 Practice on Text 1) remote_____________ 2) physical or_________________ 3) __________gathering information 4) ______________sensors 5) ____________deforestation 6) ___________and conservation sensing intimate contact devices for passive monitor land usage