When we're out on the road, other people have expectations: So, when a cyclist puts up their arm, it means they're expecting the car to yield to them and make room for them to make a lane change.
当我们在路上时， 其他人会表达各种意图： 当骑单车的人举起他们的手臂， 这就意味着他们希望有车能 让给他们点空间 以便进行换道。