1
at the racecourse
at 后接地点名词，表示在赛马场这个地方。
They spent the afternoon at the racecourse.
他们下午在赛马场度过。
赛马场；跑道
先理解核心含义，再看它在真实句子里的用法。
赛马场；跑道
a course over which races are run
They spent the afternoon at the racecourse.
他们下午在赛马场度过。
赛跑的场地,跑道。
A course over which races are run.
进行比赛的跑道
a course over which races are run
We watched the horses run around the racecourse on Saturday afternoon.
星期六下午我们观看马匹在赛马场上奔跑。
The new racecourse has a grandstand that can hold thousands of spectators.
这座新赛马场有一个能容纳数千名观众的看台。
After the rain, the racecourse was too wet for the scheduled race.
雨后，赛马场过于湿滑，原定的比赛无法进行。
at 后接地点名词，表示在赛马场这个地方。
They spent the afternoon at the racecourse.
他们下午在赛马场度过。
racecourse 是可数名词，单数形式前常加 the 表示特指。
The racecourse was crowded on race day.
比赛日赛马场很拥挤。
Not this
I went to racecourse yesterday.
Use this
I went to the racecourse yesterday.
racecourse 是可数名词单数，必须有冠词或限定词修饰；汉语中没有冠词，因此学习者常漏掉 the。此处特指某个赛马场，所以要用定冠词 the。
Not this
I watched a racecourse on TV last night.
Use this
I watched a race on TV last night.
racecourse 指赛马场（地点），而 race 才指比赛这件事。中文字面理解“赛马场”容易把地点误用作事件。要看比赛应该用 race。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
在赛马场
We agreed to meet at the racecourse.
我们约好在赛马场见面。
赛马场工作人员
A racecourse official checked our tickets at the gate.
一位赛马场工作人员在入口检查了我们的票。
赛马场场地
The racecourse grounds are open to visitors on non-racing days.
赛马场场地在非比赛日向游客开放。
赛马场经理
The racecourse manager announced that the event would be postponed.
赛马场经理宣布活动将推迟。
赛马场投注
Racecourse betting is tightly regulated in many countries.
许多国家对赛马场投注有严格监管。
赛马场设施
The racecourse facilities include stables, restaurants, and a grandstand.
赛马场设施包括马厩、餐厅和看台。
Use racecourse naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
race（比赛）+ course（路线）：马儿沿固定路线比赛，赛马场、跑道即 racecourse。
语域：neutral 常见场景：horse racing、sports、event venues racecourse 属于中性用词，不特别正式或口语化；通常用于描述赛马场或其他比赛跑道，在体育新闻、日常对话和正式文章中都比较自然。多与赛马、体育赛事相关。
All listed words end with the same vowel-consonant sound /ɔːs/ (British English; /ɔːrs/ in American English). Those containing 'course' (course, golf course, watercourse, concourse) share the spelling and final sound /kɔːs/. Coarse is a homophone of course but spelled differently, and source rhymes with these words but starts with /s/ and is spelled -ource. Do not confuse course with court /kɔːt/, which looks similar but ends with /t/.
Dictionary facts from ECDICT, WIKTIONARY.