农业机械话专业外语 (5).ppt

Reading Special English
Engineering Collage,
Heilongjiang August First Land Reclamation University
Hu jun
E-mail:hjgj7275@
(一)常见的前缀3. 表示时间,序列关系的前缀
1)ante-, anti-, 表示“先前,早于,预先”
antecedent, anticipate,
2)ex-, 表示“先,故,旧”
expresident, exhusband
3)fore-, 表示“在前面,先前,前面”
forward, forecast, foretell(预言)
4)mid-, medi-, 表示“中,中间”
midnight, midsummer
5)post-"表示“在后,后”
postwar,
6)pre-, pri-, 表示“在前,事先,预先”
preheat, prewar, prehistory
prehistoric civilization
7)pro-, 表示“在前,先,前”
prologue(序言、序幕),prophet(预言家、先知)
8)re-, 表示“再一次,重新”
retell, rewrite
4. 表示比较程度差别关系的前缀
1)by-, 表示“副,次要的”
byproduct, bywork(副业)
2)extra-,表示“超越,额外”
extraordinary,
3)hyper- 表示“超过,极度”
hypersonic(超声波), hypertension(高血压)
4)out-,表示“超过,过分”
outdo(超过), outbid(出价过高的人)
5)over-,表示“超过,过度,太”
overeat, overdress, oversleep
6) sub-, suc-, sur-, 表示“低,次,副,亚”
subeditor, subordinate, subtropical(亚热带)
7)super-, sur- 表示“超过”
supernature, superpower, surplus, surpass
8)under-,表示“低劣,低下”
undersize, undergrown, underproduction(生产不足)
9)vice- 表示“副,次”
vicepresident, vicechairman
Reading skills of scientific and technical English
Reading for Main Idea (获取主题思想)
我们可以把获取主题思想的阅读技巧分四步
identify subject word
find subject word
gain main idea
avoid disrelated content
New Words
1. lathe

A machine for shaping a piece of material, such as wood or metal, by rotating it rapidly along its axis while pressing against a fixed cutting or abrading tool.
车床:通过压紧一种固定的切割或打磨工具并迅速沿轴线转动的办法来塑造一件材料(如木头或金属)的机器
2. swing (swung) vi.(绕轴心、铰链等)回转、旋转
3. spindle
4. pulley ,轱辘,皮带轮
5. clamp ,夹子
vt.(用夹钳)夹住,夹紧
6. taper
7. reamer ,绞床
8. saddle ,滑动座架,滑板
9. apron ,机床拖板箱
10. tapping
11. quill
Unit 4 Machine Tools
The Engine Lathe(普通车床)
Engine lathe: the versatile engine lathe ranges in size and design from small bench and speed lathes to large floor types.
The workpiece may be held between tapered centers and rotated with the powder spindle by means of a clamping device, or it