分析下这个句子成分Thursday,April seventh,is World Health Day.The Worl
分析下这个句子成分
Thursday,April seventh,is World Health Day.The World Health Organization recognizes World Health Day each year to increase interest about a health issue it considers of special concern.
"it consider of special concern 在这句话中是什么成分?为什么it前面没有逗号,或者为什么不直接使用"considering of specila concern"?