这个国家的男子都在第一次世界大战的战场上牺牲了。

The nation's manhood died on the battlefields of World War I.

《牛津词典》

第一次世界大战于1914年爆发。

The first World War broke out in 1914.

youdao

第一次世界大战给20世纪的世界留下了深远的影响。

World War I left an indelible imprint on the twentieth-century world.

《柯林斯英汉双解大词典》

If you look at the history of U.S. Taxes, the very simple history is World War One and World War Two.

如果你看一下美国税收历史，里面提到了一个典型的时期,就是一次世界大战和二次世界大战的时候。

耶鲁公开课 - 金融市场课程节选

It doesn't sound right when other men are out there dying, so they raised taxes during World War One.

在有人战死沙场的时候,发战争财是件龌龊的事情，所以他们在第一次世界大战时这么做了。

耶鲁公开课 - 金融市场课程节选

So,if you take number one--but we don't have to go through them all and I assure you we won't--if you take number one, the Ain,a-i-n,it's named after a river; or if you take number two,the Aisne,a-i-s-n-e, it's named after a river; and how many hundreds of thousands of people died along there in World War One or,you take number three,the same thing,Allier.

如果你看第一个省,我向你们保证,我们不用挨个了解,看第一个省,安省,a-i-n,来自一条河的名字,或是第二个埃纳省,a-i-s-n-e,来自于一条河的名字,有成千上万的人在这里死于,第一次世界大战,第三个,阿列省

耶鲁公开课 - 1871年后的法国课程节选