汽车实用英语（第二版）教学课件汇总完整版电子教案.ppt

3. The value of the sound-detecting and amplifying stethoscope is, of course, to help the technician distinguish the difference between normal and abnormal sounds and to find the location and cause of the latter. 翻译：起探测声音和放大声音作用的听诊器，其声音强度有助于技师辨别发动机内的正常声音和异常声音，并使他发现发出异常声音的部位和原因。 4. You can trace both unfamiliar and familiar sounds to the portion of the engine where they originate by following the sound with the prod of the stethoscope until the noise reaches its maximum intensity. 翻译：用听诊器探针探测噪音，直到所探测到的噪音强度最大，从而发现噪音部位，通过这种方法，你就可以跟踪那些熟悉或不熟悉的噪音找到发动机上噪音源。 Practical reading notes 1. The parts that produce some characteristic noises are loose pistons, excessively worn rings or ring lands, loose piston pins, worn connecting-rod bearings, worn main bearings, loose vibration damper or flywheel, or worn or loose valve-train components. 翻译：产生带某种特征噪音的部件有松动的活塞、过度磨损的活塞环或环岸、松动的活塞销、磨损的连杆轴承、磨损的主轴承、松动的减振器或飞轮以及磨损或松动的配气机构的元件。 2. Second, a careful interpretation of abnormal engine sounds can prevent the engine from requiring extensive and costly repair work after continued usage has ruined it. 翻译：再则，对发动机异常噪音的正确解读能避免发动机在已经损坏的情况下继续使用，否则会导致后续的大量维修工作和昂贵的维修费用。 3. The sideslip tester measures the distance in meters over which a wheel of an axle is dragged sideways, when the other wheel of that axle runs straight for one kilometer.? 翻译：侧滑试验台以米为单位来测量，当某一轴上的一个车轮笔直向前行驶一千米时，该车轴上的另一车轮被向一旁牵引的距离（即侧滑量）。 4. A diesel smoke meter uses micro-waves to detect the density of black smoke contained in the exhaust gas discharged from the diesel engine through an exhaust pipe. 翻译：柴油机烟度计用微波来检测柴油机排气管中所排出的废气中包含的黑烟的浓度。 5.The leak detector is used for locating leaks in any pressure and vacuum system, and is also used to examine the discharge troubles in electric apparatus. 翻译：泄露检查器用于查找所有压力和真空系统中的泄露点，也用于查找电气设备中的漏电故障。 Exercises 1.Choose the best answer from the following choices according to the text 1) Diesel Smoke Meter is used for the measurement of smoke emitted from vehicle with engine. A. gasoline