1
throw the discus
throw the discus 既指投掷铁饼的动作，也可指参加掷铁饼项目。
She threw the discus 55 meters at the track meet.
她在田径运动会上把铁饼掷了55米。
铁饼
discuses — plural of discus
先理解核心含义，再看它在真实句子里的用法。
铁饼
a disk used in throwing competitions
She threw the discus 55 meters at the track meet.
她在田径运动会上把铁饼掷了55米。
铁饼(投掷运动用具)。
A round plate-like object that is thrown for sport.
铁饼投掷运动项目。
The athletics event of discus throw.
七彩神仙鱼(盘丽鱼属)。
A discus fish (genus Symphysodon)
He spun around and threw the discus across the field.
他旋转一圈，把铁饼掷过整个场地。
The athlete polished the discus before the competition.
运动员在比赛前擦拭铁饼。
She practiced her grip on the heavy discus.
她练习握紧沉重的铁饼。
throw the discus 既指投掷铁饼的动作，也可指参加掷铁饼项目。
She threw the discus 55 meters at the track meet.
她在田径运动会上把铁饼掷了55米。
表示参加掷铁饼这一比赛项目时，常用介词 in 加 the discus。
He will compete in the discus at the Olympics.
他将参加奥运会上的掷铁饼比赛。
Not this
They discus the problem at the meeting.
Use this
They discuss the problem at the meeting.
“discus”是名词，指“铁饼”，不能用作动词；表示“讨论”应使用动词“discuss”，且它可直接跟宾语。
Not this
He threw discus in the competition.
Use this
He threw a discus in the competition.
“discus”是可数名词，单数形式前需加不定冠词“a”；汉语没有冠词，因此容易漏掉。
Not this
The coach brought two discus to the stadium.
Use this
The coach brought two discuses to the stadium.
“discus”的复数形式是“discuses”，不是与单数同形；表示两个或以上铁饼时须加复数词尾。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
掷铁饼
She threw the discus over fifty meters.
她掷铁饼掷了五十多米。
铁饼投掷
The discus throw is one of the oldest Olympic events.
铁饼投掷是最古老的奥运会项目之一。
铁饼运动员
The discus thrower set a new personal best.
这位铁饼运动员创下了个人最好成绩。
掷铁饼比赛
He won the discus competition at the national championships.
他在全国锦标赛上赢得了掷铁饼比赛。
Use discuses naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：把 discus 拆成 disc（圆盘）＋us（我们）——圆盘由我们投出，就是铁饼。
语域：neutral 常见场景：田径比赛、奥运赛事、体育教学 discus 通常用于体育语境，属于标准中性词，多出现在田径比赛、赛事报道或体育教学中；日常口语里往往直接用 throw the discus 或 discus throw 来表达。
↳ 真押韵：meniscus /məˈnɪskəs/ 与 discus 从重读元音 /ɪ/ 起到末尾完全相同，二者押韵。↳ 同尾音但不同韵：circus、mucus、focus 均以 /kəs/ 结尾，但重音在首音节且元音不同，故不押韵。↳ 拼写干扰：discuss 看起来像 discus，但读 /dɪˈskʌs/，重音在第二音节且元音为 /ʌ/，注意区分。↳ disc /dɪsk/ 是 discus 的前四个字母，读音也与 discus 首音节相同。
Dictionary facts from ECDICT, WIKTIONARY.