Jyutping
sei3 sap6 nin4 doi6
Pinyin
sì shí nián dài
Definitions (CC-CANTO)
during the 40s (era)
Definitions (Wiktionary)
noun
forties
Examples (Tatoeba—Mandarin-English)
Mandarin
到了四十年代，旗袍有了种类繁多的图案和面料，也有了同样种类繁多的饰品。
到了四十年代，旗袍有了種類繁多的圖案和麪料，也有了同樣種類繁多的飾品。
dào liǎo sì shí nián dài ， qí páo yǒu le zhǒng lèi fán duō de tú àn huó miàn liào ， yě yǒu le tóng yàng zhǒng lèi fán duō de shì pǐn 。
By the 1940s, the qipao came in a wide variety of designs and fabrics, with an equally wide variety of accessories.
Examples (Wiktionary)
Mandarin
那种“一人独吞”、“人莫予毒”的派头，不过是封建主的老戏法，拿到二十世纪四十年代来，到底是行不通的。
那種“一人獨吞”、“人莫予毒”的派頭，不過是封建主的老戲法，拿到二十世紀四十年代來，到底是行不通的。
nà zhǒng “ yī rén dú tūn ” ， “ rén mò yú dú ” de pài tóu ， bù guò shì fēng jiàn zhǔ de lǎo xì fǎ ， ná dào èr shí shì jì sì shí nián dài lái ， dào dǐ shì xíng bu tōng de ．
Such attitudes as "I and I alone will take everything" and "no one dare harm me" are nothing but the old tricks of feudal lords which simply will not work in the Nineteen Forties.