机电工程专业英语 教学课件 作者 朱晓玲 Lesson 23 Manual Transmission in Automobile.pptVIP

Lesson 23 Manual Transmission in Automobile 词汇讲解 课文分析 练习答案 本课教学目标： Section Ⅰ： words and phases Having a glance at the new words table, you’ll find every word is very professional. How to remember these words and phrases rapidly? There is no short-cut. The only way is “more practice”. Check if you have remembered all the words or not with the help of your deskmate. Section Ⅱ： text At first, read the first paragraph silently in 3 minutes, please. paragraph Ⅰ: A manual transmission (also known as a stick shift, or standard transmission) is a type of transmission used in automotive applications. Manual transmissions often feature a driver-operated clutch and a movable gear selector, although some do not. Most automobile manual transmissions allow the driver to select any gear at any time, but some, such as those commonly mounted on motorcycles and some types of racing cars, only allow the driver to select the next-highest or next-lowest gear ratio. This second type of transmission is sometimes called a sequential manual transmission. 手动变速器(亦作变速杆和标准变速器)是汽车驾驶时应用的一种变速器.手动变速器通常以司机可操纵的离合器、可动的档位选择器为特征,然而也不尽然.大多数的汽车手动变速器允许司机随意选择任何档位,但某些手动变速器,如那些一般装在摩托车和某些种类的赛车上的,就只允许司机选择相临档位的齿数比。后一种的变速器有时也被称为顺序手动变速器。 Oral English practice : Ask your deskmate a question according to the first paragraph. Read the second paragraph silently in two minutes, please. paragraph Ⅱ: Manual transmissions are characterized by gear ratios that are selectable by engaging pairs of gears inside the transmission. Conversely, automatic transmissions feature clutch packs to select gear ratio. Transmissions that employ clutch packs but allow the driver to manually select the current gear are called semi-automatic transmissions. 手动变速器的特征参数为传动比, 通过选择变速器内部的啮合齿轮对可选择传动比.相反地,自动变速器的特点是利用离合器箱来选择传动比.既能实现自动变速又能实现手动变速的变速器叫做半自动变速器。 Oral English practice : Ask your deskmate a question according to the second paragraph. Flip through the third paragraph in two minutes, please. paragraph Ⅲ: Contemporary automotive