威莉's ' "苦與甜" was released on its scheduled release date, January 1, 1970. The duration of This song is about two minutes long, specifically at 2:35. This song does not appear to have any foul language. 苦與甜's duration is considered a little bit shorter than the average duration of a typical track. There is only one song in 四海歌曲精華（新版）8, so we believe that "苦與甜" is a single. In terms of popularity, 苦與甜 is currently unknown. The mood doesn't appear to be that danceable, but it still produces a high amount of positive energy.
The tempo marking of 苦與甜 by 威莉 is Andante (at a walking pace), since this song has a tempo of 97 BPM. With that information, we can conclude that the song has a slow tempo. The time signature for this track is 4/4.
F Major is the music key of this track. This also means that this song has a camelot key of 7B. So, the perfect camelot match for 7B would be either 7B or 8A. While, 8B can give you a low energy boost. For moderate energy boost, you would use 4B and a high energy boost can either be 9B or 2B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 7A or 6B will give you a low energy drop, 10B would be a moderate one, and 5B or 12B would be a high energy drop. Lastly, 4A allows you to change the mood.
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