Your bus pass is like your subway pass. 公车月票就像你的地铁通行证。
In this case, you show the pass to the driver; the driver looks at the pass to see that it is a good pass. 在这种情况下,你向司机出示公车月票;司机看一看公车月票,看月票是否有效。
Lucy then sits "down near the front of the bus and three more people get on board." 然后,露西在“公交车的前面”坐了下来,“这时又有三个人上车”。
On board, "board," means to be on a plane, or a train, or a bus, or a ship. “On board”(board)指的是在飞机、火车、公共汽车或轮船上。
You may say, "I need to get on board my plane," that means you need to get onto your plane - you need to go into your plane. 你可能会说,“我需要上飞机,”这意味着你需要登上飞机——你需要进入飞机。