求翻译：4.教练车车子是化油器式的，最好保养一下，疏通油路和气路，以保证有良好的油气混合比，启动装置要良好有效，如阻风门要良好，操作自如，自动的要检查灵活有效，因为这关系冬季有良好的起动性能，不能忽视。还要检查空气滤清器，它关系启动的油气混合比，很重要，电喷的要根具使用时间调整和清洗节气们总成，低温加浓装置和空气流量传感器等，这几个装置对发动机有较大影响，对起动性能尤其重要。柴油机要换相应的低温柴油，检修柴油油路。是什么意思？

4. the coach car the car is a carburetor, preferably a bit and clear the way oil and gas, to ensure a good mix of oil and gas than, starting device to good and effective, such as choke good, easy operation, to automatically check the flexible and effective, because this winter there is a good starting performance, cannot be ignored. To check the air filter, oil and gas mix than it started, it is very important, to the root of the EFI uses time adjustment and cleaning the throttle Assembly, enhancement device at low temperature and air flow sensor, these devices have a larger impact on the engine, especially important to starting performance. To swap the corresponding low temperature diesel for diesel engines, maintenance of diesel oil.