c. 1400, filli, fyly, "a young mare, female colt or foal," possibly from Old Norse fylja, fem. of foli "foal" (see foal (n.)). Slang sense of "lively young girl" is from 1610s.
权威例句
1. What your mare always gives you when you want a filly.
当你想要母驹的时候,母马总给你生的东西.
2. Your daughter is getting to be a finelooking filly.
你女儿正慢慢出落成一位婷婷少女.
3. Filly female horse that is 4 years old or under.