four-speed gear shift

例句：

1. 1. The car has a four-speed gear shift, which makes it easy to switch between different speeds.
   这辆车有四速档位切换，这使得在不同速度之间切换变得容易。
2. 2. When driving on the highway, it's important to know how to use the four-speed gear shift to save fuel andreduce emissions.
   在高速公路上驾驶时，知道如何使用四速档位切换来节省燃油和减少排放是很重要的。
3. 3.The mechanic showed me how to use the four-speed gear shift to change gears quickly and efficiently.
   技师向我展示了如何使用四速档位切换来快速而有效地换挡。