Hi,
In most music the crotchet, also called 'quarter note', represents the length of one beat.1拍
Semibreve = 全音符
breve = 短音符;二全音符
Since I don't much anything about my music, let me leave you a website that may help you find your answer.
http://www.jazclass.aust.com/1readm/mn5.htm#01
Good luck!
Bye
2008-11-20 16:22:14 補充:
Since I don't anything about my music, ************
one crotchet 四分音符= one beat = quarter note************