业已发现 meaning in English
it has been found that
Examples
- Silver compounds which became blackened by sunlight were known in the 18th century .
十八世纪人们业已发现银化物遇阳光会变黑。 - Therefore , a study of incremental data mining algorithm is urgently needed . incremental data mining only modifies rule sets when database is updated , which takes advantage of previous calculation result and prevents knowledge extraction from the very beginning
把增量算法与数据库的更新结合在一起，渐增地进行知识的更新、修正和加强先前业已发现的知识，这样可以不必重新挖掘全部数据。