请问"Who is the girl?"和"Who is this girl?"意思有什么不同?

请问"Who is the girl?"和"Who is this girl?"意思有什么不同? who is this girl who is the girl? Who is the girl ( )blue. Who is the beautiful girl the girl who is XX Who is the girl ( ) came to see you this morning ‘who is that girl who is my girl? Who is that girl? 将the girl who talked to me is Mary 和the girl who i talked wi so lovely,so sweet.this is the girl who will marry me译成中文的意思