Meaning of dài:
dài
代
Verb
to be a substitute for; to act on behalf of; to replace; to substitute
Tā jiāng yóu wǒ lái dàitì chūxí huìyì.
他将由我来代替出席会议。
He will have me attend the meeting on his behalf.
Noun
generation; dynasty; age; period; (historical) era; (geological) eon
Zhè shì yīgè kējì fēisù jìnbù de shídài.
这是一个科技飞速进步的时代。
This is an era of rapid technological advancement.
