Cách sử dụng
"Change down" is an expression that you use when you are driving a car with manual transmission. It means to shift the gear lever to a lower gear, usually to slow down the car when you are going downhill or coming to a stop. It is important to change down when driving to avoid putting too much strain on the engine and brakes. However, if you are driving an automatic car, you don't need to worry about changing gears - the car will do it for you automatically.