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rider on [vehicle/animal]
表示骑乘的交通工具或动物时，常用介词on。
The rider on the black horse won the race.
那匹黑马上的骑手赢得了比赛。
骑手
先理解核心含义，再看它在真实句子里的用法。
骑手
A person who rides a horse, bicycle, motorcycle, etc.
The rider on the black horse won the race.
那匹黑马上的骑手赢得了比赛。
骑马的人
A mounted person.
附加条款
An addition, supplement.
技术含义
Technical senses.
The rider on the horse waved to the crowd.
马上的骑手向人群挥手。
The cyclist rider overtook the car on the steep hill.
自行车骑手在陡坡上超过了汽车。
The motorcycle rider sped down the highway.
摩托车骑手在高速公路上飞驰。
表示骑乘的交通工具或动物时，常用介词on。
The rider on the black horse won the race.
那匹黑马上的骑手赢得了比赛。
形容词修饰rider，描述骑手的特征。
She is a cautious rider.
她是一位谨慎的骑手。
rider后可接of短语，但不如on常见。
The rider of the motorcycle wore a helmet.
那辆摩托车的骑手戴了头盔。
Not this
He is a bus rider.
Use this
He is a bus passenger.
在英语中，'rider'通常指骑自行车、摩托车或动物的人，而不是乘坐公共交通的人。乘坐公交车的人应使用'passenger'，这是汉语'乘客'的正确对应。
Not this
The rider drove the horse.
Use this
The rider rode the horse.
控制马匹的动作应用'ride'（骑），而'drive'用于驾驶车辆（如汽车、卡车）。汉语中可能用'驾驶'笼统表示，但英语动词区分明确。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
骑马者
The horse rider won the race.
这位骑马者赢得了比赛。
骑自行车的人
Bicycle riders should wear helmets.
骑自行车的人应该戴头盔。
摩托车骑手
Motorcycle riders often wear leather jackets.
摩托车骑手通常穿皮夹克。
公交车乘客
Bus riders must pay the fare.
公交车乘客必须付车费。
火车乘客
Train riders can enjoy the scenery.
火车乘客可以欣赏风景。
保单附加条款
The insurance policy includes a rider for flood damage.
这份保险单包含洪水损害的附加条款。
搭便车者；不劳而获的人
Some members of the team are free riders who never contribute.
团队中有些成员是搭便车者，从不做贡献。
附加条款；补充条款
The senator proposed to add a rider to the bill.
参议员提议在该法案上附加一项条款。
保险附加条款；附加险
You can purchase an insurance rider to cover dental care.
你可以购买一个附加险来覆盖牙科护理。
我是恶灵骑士。
The rider on the horse was a cowboy.
马上的骑手是个牛仔。
嗨呀嗨呀，天上的幽灵骑手。
A rider galloped across the plains.
一个骑手奔驰过平原。
Use rider naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 rider 联想成 'ride'（骑）加上人，就是骑手。
通常用于日常或体育场景，语气中性，指骑自行车或摩托车的人。
Words that rhyme with rider (ending in /aɪdər/): hider, cider, wider. Note that words like writer have a similar spelling but a different final consonant (/t/ instead of /d/), so they do not rhyme in standard pronunciation.
Dictionary facts from ECDICT, WIKTIONARY.