名詞 arena:

1. a particular environment or walk of life
   同義詞：sphere, domain, area, orbit, field
2. the central area of an ancient Roman amphitheater where contests and spectacles were held; especially an area that was strewn with sand
3. a large structure for open-air sports or entertainments
   同義詞：stadium, bowl, sports stadium
4. a playing field where sports events take place
   同義詞：scene of action

1. Look, our athletes are marching into the arena! They all look full of vigour in sweat-shirts emblazoned with the name of our school.
   看，我校的運動員進場來了！他們穿著印有我校校名字樣的運動衫，看上去個個精力充沛。
2. An arena where contests and spectacles are held.
   競技場所舉行比賽或表演的圓形角斗場
3. The Roman arena was very famous.
   羅馬競技場是很出名的。
4. She entered the political arena after her husband's death.
   她丈夫死后，她進入了政界。

a.re.na

n.（名詞）
A large modern building for the presentation of sports events and spectacles.
場地，室內運動場：進行體育活動或公開表演的大型現(xiàn)代建筑
A place or scene where forces contend or events unfold:
競爭場所，活動場所：力量抗爭或事件表露的場所或場景：
例句：
withdrew from the political arena; the world as an arena of moral conflict.
從政治舞臺上退出；世界象一個道義沖突的競爭場所

The area in the center of an ancient Roman amphitheater where contests and other spectacles were held.
競技場：古羅馬圓形露天競技場的中心區(qū)域，在此進行競賽和其它公開的大型表演

來源：
Latin harôna, arôna [sand, a sand-strewn place of combat in an amphitheater]
拉丁語 harôna, arôna [圓形劇場搏斗的沙地或鋪沙地]
[perhaps of Etruscan origin]
[可能源于埃特魯斯坎]

<注釋>Fans watching contact sports such as boxing, hockey, or football in modern arenas might be struck by the connection between the wordarena and the notion of gladiatorial combat. This word is from Latinharôna (also spelled arôna ), .sand.. Harôna then came to mean the part of a Roman amphitheater that was covered with sand to absorb the blood spilled by the combatants.Arena is first recorded in English during the 7th century, denoting this area of a Roman amphitheater.
在現(xiàn)代劇場中觀看接觸運動如拳擊、曲棍球或足球的愛好者們可能會發(fā)現(xiàn)單詞arena 與競技搏斗概念的關系。 這個單詞來源于拉丁語harena （也拼作 arena) ，.沙地.。 Harena 后來便意指著羅馬圓形劇場的一部分， 它由沙覆蓋以吸收競技斗士濺出的鮮血。Arena 在7世紀首次記入英語，意指羅馬圓形競技場的這部分