turn out to be [sth/sb]v exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."
(be discovered to be)
原来是 yuán lái shì
原是
turn out to be [sth/sb]v exprverbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end."