the process of happening
an event; happening
"a disease of frequent occurrence"
"the occurrence (or presence) of life on other planets"
Observing a series of ordinary occurrences through the glamour of an active imagination.
出自： A. Merritt
Evidence of the occurrence of that fish on the Kentish coast.
出自： J. E. T. Rogers
Occurrences of ore were known to be much more widespread than those of uranium minerals.
出自： M. Gowing