World War I left an indelible imprint on the twentieth-century world.
第一次世界大戰(zhàn)給20世紀的世界留下了深遠的影響。
Some have called him the greatest entertainer of the twentieth century.
有人稱他為20世紀最偉大的表演藝術家。
This was how I stepped into my twentieth year.
我就是這樣地跨進我的二十歲。