WWI is the short written form of World War I — the war fought mainly in Europe from 1914 to 1918. The 'I' here is the Roman number one, so you read the whole thing aloud as 'World War One'. Nobody says the letters 'double-you double-you eye'; the abbreviation is for the eye, not the ear.

WWI isWWI是 the short written form of World War I世界大戰一的縮寫 — the war fought mainly in Europe那場主要在歐洲打的戰爭 from 1914 to 1918從1914年打到1918年。The 'I' here這裡的'I' is the Roman number one是羅馬數字的一, so所以 you read the whole thing aloud你唸出來的時候 as 'World War One'要唸成'World War One'。Nobody says the letters沒有人會唸這幾個字母 'double-you double-you eye'唸成'double-you double-you eye'; the abbreviation is for the eye這個縮寫是給眼睛看的, not the ear不是給耳朵聽的。

It belongs to writing where space is short: history notes, timelines, museum labels, exam questions, chapter headings. In an ordinary sentence in a real essay or article, most writers spell it out as World War I or the First World War.

It belongs to writing where space is short它屬於版面有限的寫作場合: history notes, timelines, museum labels, exam questions, chapter headings歷史筆記、時間軸、博物館標示、考題、章節標題。In an ordinary sentence在一般的句子裡 in a real essay or article在正式的文章裡, most writers spell it out大部分作者會把它完整拼出來 as World War I or the First World War寫成World War I或the First World War。

British writers tend to prefer 'the First World War'; American writers use 'World War I' a bit more. And note that people only started calling it 'the First' once there was a second one — before 1939 it was 'the Great War', which you will still see in old books and on memorial stones.

British writers tend to prefer英國作者比較偏好 'the First World War'; American writers use美國作者比較常用 'World War I' a bit more多一點。And而 note that要注意 people only started calling it 'the First'人們是後來才開始叫它'the First' once there was a second one等到有了第二次世界大戰之後才這樣叫 — before 1939在1939年之前 it was 'the Great War'它叫做'the Great War', which you will still see你現在還會看到 in old books and on memorial stones在舊書和紀念碑上。