Not only will you save money on fuel and the general upkeep of car but other knock on effects include the improved outdoor air quality and reduction on road congestion.
你不仅可以在燃料和汽车日常保养费上省下钱，也对改善室外空气质量和降低道路拥堵起了很大的作用。
2
The tendency of a hydrocarbon fuel, such as gasoline, to knock is measured by its octane number.
一个碳氢燃料的趋势，如汽油，敲是衡量其辛烷值。
3
Reduces engine knock, improves ignition and engine response, helps fuel burn cleaner and inhibits corrosion.