a collection of songs put together for a particular person or occasion but not professionally produced, especially on a cassette (= a flat rectangular device containing a very long strip of magnetic material for recording sound)

I made a mixtape for my girlfriend. 我为我的女朋友做了一盘混合录音带。

Remember the '80s when you could make someone a mixtape on a cassette? 还记得在80年代，你可以用卡带给别人做一盘混和录音带吗？

a collection of songs from one or more artists, produced professionally and usually put on the internet for people to listen to for free

Mixtapes can actually bolster an artist's sales. 混合歌集实际上可以促进艺术家的作品的销售。

Rappers have grown increasingly good at using mixtapes to promote themselves. 说唱歌手越来越善于利用混合歌集来宣传自己。