rider

Compared meaning: a person on a vehicle, bike, or horse (noun).

比较义项：乘坐交通工具（或骑乘马、自行车等）的人（名词）。

• passenger

  Passenger refers to someone being transported who is not driving or operating the vehicle, typically in a car, bus, train, or plane; it always implies another person is in control.

  passenger指不驾驶、不操控交通工具而被搭载的人，通常出现在汽车、公交车、火车或飞机等由他人驾驶的交通工具中；该词总是暗示有另一个人在操控。

  Every passenger must wear a seatbelt during the flight.

  每位乘客在飞行期间都必须系好安全带。

• rider 本词

  Rider refers to someone who rides and typically controls a bicycle, motorcycle, or horse; it implies active steering, not passive transport in an enclosed vehicle.

  rider指骑乘并通常操控自行车、摩托车或马的人；强调主动操控，而不是在封闭交通工具中被动运送。

  The rider slowed down before turning onto the busy street.

  骑手在转入繁忙街道之前减慢了速度。

Both mean a person on a vehicle. Passenger means someone carried, not driving, in a car, bus, train, or plane. Rider means someone who controls a bike, motorcycle, or horse. On a motorcycle they are almost opposite: the rider controls it; the passenger sits behind.

这两个词都可以指“交通工具上的人”，但含义和典型场景不同：passenger强调乘坐时不驾驶、被动搭乘，常用于汽车、公交、火车或飞机；rider强调骑乘并操控自行车、摩托车或马，带有主动性。在摩托车语境中，两者甚至相对——操控车的人是rider，坐在后座、不操控的人才是passenger。