n.骑自行车的人；骑摩托的人
We just avoided a major collision with that biker. 刚才我们差点儿和那个骑自行车的撞了个正着。
Somebody told me that Peter is a really good mountain biker. 有人告诉我，彼特是个很棒的山地摩托车车手。
motorcyclists 骑摩托车的人
