When driving on the highway, you need to make sure no one is in your blind spot before changing lanes.在公路上驾驶时，你必须先确保视线盲区里没人，然后再变换车道。Be careful when changing lanes in fast-moving traffic.车流快的时候变车道要小心。The truck's driver kept changing lanes.卡车司机不断变换车道。I hate changing lanes when the traffic is heavy.我讨厌交通拥挤时变换车道。