It was a short way of writing a different spelling of the words all correct. Some foreign-born people wrote all correct as o-l-l k-o-r-r-e-c-t, and used the letters O.K.

VOA: special.2010.02.28

This actually I think derives from a Greek word, "Synkope, " S-y-n-k-o-p-e, synkope.

这个术语我觉得来源于希腊语,Synkope,S-y-n-k-o-p-e

耶鲁公开课 - 聆听音乐课程节选

This actually I think derives from a Greek word, "Synkope, " S-y-n-k-o-p-e, synkope.

这个术语我觉得来源于希腊语,Synkope,S-y-n-k-o-p-e

耶鲁公开课 - 聆听音乐课程节选